Asus ZenBook S review: S is for Style, not for Substance

Update: At CES 2019, Asus revealed its revamped ZenBook S13. It has ultra-thin bezels, measuring only 2.5mm, and is pitched by the company as the world’s thinnest laptop with discrete graphics, powered by an Nvidia GeForce MX150. Read more here. 

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“What’s that? It looks weird!”, is what several tech journalists have said to me upon seeing the Asus ZenBook S for the first time. Granted, it does look a little odd, but you shouldn’t judge a laptop by its ergonomically elevated keyboard.

Though the Asus ZenBook S may appear unconventional, it’s not that different under the lid. In fact, it’s all too average in terms of its hardware and performance output. Could this be a case of style over substance, then?

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Asus ZenBook S review: What you need to know

The ZenBook S is designed to function as an ultra-portable spin-off to the Asus ZenBook and Asus ZenBook Pro devices. It’s a sleek, compact device with a 13.3in IPS display, weighing only 1.4kg. When closed it has an incredibly slim depth of 12.9mm, slipping neatly into a rucksack, or under your arm when on the move. It even comes with its own snazzy protective sleeve.

As with any laptop, there are numerous configurations to choose from. For this review, I’ve been given a model with a Full HD, non-touch-enabled screen, an Intel Core i7-8550U processor, 8GB RAM and 256GB SSD. The price of the Asus ZenBook S fluctuates wildly between the varying specifications – more on that below- but all use Windows 10 Home as the default operating system.

Asus ZenBook S review: Price and competition

The exact configuration I’m reviewing is sold exclusively in the UK by John Lewis, and it goes for £1,099. That’s not as much as some of my colleagues had guessed based on its dazzling design but bear in mind that this does not even get you a touchscreen, while the resolution’s a fairly average 1,920 x 1,080.

For the burgundy finish, John Lewis is your only option, but through Asus UK you can purchase a ZenBook S in blue with the exact same specs aside from RAM (16GB instead of 8GB), while there’s another which is identical aside from its touch-enabled screen.

For around the same money as this review model could get your hands on a number of excellent machines, including the stunning new Microsoft Surface Laptop 2, which I reviewed at £1,249. Though slightly more expensive, its performance benchmarks beat the ZenBook S at every turn. You could also pick up a Dell XPS 13 for £1,249, although the class-leading model featured in our review cost £1,649.

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Asus ZenBook S review: Design

As mentioned previously, the ZenBook S has an unusual appearance for a laptop thanks to the elevated base. When the lid is closed it lies flat to the table surface just like any other laptop. But behind the hinge at the rear edge of the laptop is a bit of extra bulk which acts as a lever, pushing the laptop’s base upwards off the table when the lid is opened.

Besides looking pretty cool (in my opinion), this has two key effects. Firstly, it provides more ventilation for the CPU, providing a lot of space to dissipate heat. Secondly, the angle provides a more ergonomic, ‘natural’ typing experience – at least, that’s the idea.

The extra ventilation is much needed as it happens because the ZenBook S gets extremely warm when performing more demanding applications – and sometimes when it’s not doing anything at all. Grabbing the IR thermometer gun from the Expert Reviews labs, I clocked the base’s temperature at 54 degrees centigrade. According to LiveScience an egg can be cooked at 55 degrees. For a more worrying point of reference, human skin can be burned by temperatures as low as 44 degrees. This means it’s not really suitable for use on your lap. Given that we’re talking about a laptop, that’s a real problem.

Still, the ZenBook S is a fetching device – it has an all metal (mostly aluminium) body which features Asus’ trademark ‘spun metal’ finish on the lid, and it comes in either a striking burgundy red or an equally attractive deep blue. At 311 x 213 x 12.9mm, this is one trim laptop. But that svelteness comes at a cost: ports.

Excluding the 3.5mm audio jack on the lower right-hand side of the lid, there are only three ports on the Asus ZenBook S, and they’re all USB-C. Asus includes two clunky adapters, one for USB 3.0 to USB-C and the other for HDMI to USB-C. When plugged in they seriously cramp the ZenBook S’ style, and there’s always a possibility that you might lose them and have to buy your own down the line. Asus sells its own Mini Dock for £75.

Dual Harman/Kardon speakers are tucked away on the laptop’s underside, where they sit towards the front and lie in contact with the table surface. This has the effect of boosting the audio, although even at max volume the ZenBook S suffers from a tinny sound. I’ve tested smartphones with louder speakers than these, so buying a separate Bluetooth speaker is definitely a good idea.

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Asus ZenBook S review: Keyboard and touchpad

The elevated keyboard takes some getting used to, especially if you type primarily on a flat keyboard as I do. After a few minutes, it really grew on me, however, and I enjoyed the angle at which my wrists rested while my fingers typed. It definitely felt as though my hands were in a more neutral position, which in turn made typing feel easier.

Having said that, I did not enjoy the keys themselves so much, as there’s little satisfaction to be drawn from the limited travel or the overall feel. Personally, I prefer a more weighty, clicky keyboard with more travel depth. All the same, I didn’t have any problems with the layout and must admit that the glossy red finish is pretty nice.

On the touchpad is a fingerprint reader, nestled in on the upper right corner, but this turns out to be a poor design decision. There are many places on the laptop where a fingerprint reader could have been installed, so why add it here? When using the touchpad, a conscious effort must be made to avoid the section of the containing the sensor. Once your finger slips into the inset groove of the reader, you lose control of the cursor. Essentially what you’ve got is a touchpad with a chunk missing.

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Asus ZenBook S review: Display

The 13.3in IPS display on my ZenBook S review model has a 1,920 x 1,080 resolution, although there is also a 4K touch-enabled configuration available. The display looks fine when playing Full HD YouTube and Netflix videos, but our display calibrator revealed that it has a pretty sub-par gamut coverage of 87%, which is compounded by oversaturation. Every colour, aside from some shades of black and grey, is inaccurate and an average Delta E of 5.1 highlights how unsuited the ZenBook S is for photo or video editing.

A contrast ratio of 1099:1 is unusually low for a laptop of this price. Display brightness is also disappointing, with a maximum measured luminance of 288cd/m2; simply put, that’s not good enough for a mid-range laptop, let alone a premium effort. Working under harsh lighting conditions the screen will suffer from glare, making it difficult to see when sat by a window on a bright day, and borderline unusable in direct sunlight. Given how hot the laptop gets indoors, I would avoid putting it in sunlight either way.

Asus ZenBook S review: Performance and battery life

Now for the all-important benchmarks. Inside this Zen Book S is an Intel Core Kaby Lake R i7-8550U, plus 8GB RAM. Although the CPU came out pretty well from our media benchmark tests, with an overall score of 62, I had hoped it might keep up better with the likes of the Surface Laptop 2, which achieved a speed of 84 using a lesser i7-8250U chip.

Sequential read and write speeds, while not terribly slow, are a notch below the competition. The SSD in the Asus achieved file read speeds of 459MB/s, and wrote files at 204MB/s which, again, falls short of the Surface Laptop 2, as shown in the chart below. Of course, my test sample packs in a 256GB SATA-3 SSD rather than the 512GB NVMe SSD found in the Dell XPS 13, which is leaps and bounds ahead in terms of throughput, and configurations are available with a 512GB or 1TB PCI-E drive. If you’re working on tasks where SSD performance matters, you’re likely to notice the difference.

Gaming options on the Asus ZenBook S are limited. It only has Intel UHD Graphics 620 integrated graphics and performs averagely in our various gaming benchmarks. It ran DiRT Showdown at 1080p at an average rate of 22.56fps – not unplayable, but far from great.

Buy the Asus ZenBook S now from John Lewis

The more demanding Metro: Last Light 1080p benchmark hovered around the 12fps mark, suggesting that you better keep the gaming light on the ZenBook S. That said, it’s not any worse than other laptops in the price range. In the GFXBench Manhattan onscreen test, it scored an average of 45.2fps; a little higher than the Surface Laptop 2’s 39.1fps.

The ZenBook S didn’t do too well in the battery rundown test. Given that it only has an FHD, non-touch display, I had hoped it might surpass rival laptops with higher resolutions or touch displays, or both. Sadly, its battery life only lasted for 6hrs 13mins of continuous video playback, which is about an hour shorter than the Surface Laptop 2.

I would consider anything below 6hrs in the standardised battery life benchmark to be unacceptable on a laptop costing £1,000 or more, so the ZenBook S is treading a fine line here. Odds are that the battery life on the 4K touch-enabled configuration is considerably shorter.

Asus ZenBook S review: Verdict

Asus gets top marks for style, but there are too many issues with the ZenBook S to recommend it over laptops like the Surface Laptop 2, the Dell XPS 13 or even the LG Gram, all of which can be bought for around the same price. Aside from its neat elevating hinge design, there’s nothing remarkable about it, and its benchmarks results are far from special.

Add to that the heating issues, flawed touchpad design and woeful lack of ports, and the price tag starts to look unreasonable. This is a laptop that, in aesthetic terms, has many positives, but go beyond the looks and the niggles soon outweigh them. Students and casual users might get by just fine, but if you’re looking for a laptop that’s capable of being something more than just eye candy, look elsewhere.