If the most important feature of a tablet is that it's thin, then Toshiba just made one that's a must buy. The 10.1in AT200 is 7.7mm thick and weighs just 535g. That makes it slimmer and lighter than an iPad 2 (8.8mm, 601g), a Samsung Galaxy Tab 10.1 (8.6mm, 565g) or even the business half of ASUS' Transformer Prime (8.3mm, 586g).

Fortunately, our suite of tablet tests involves more than just whipping out a ruler. Here's the real skinny on the AT200.

Toshiba AT200 – size and shape

At 7.7mm thick it may well be the thinnest tablet around, but as the AT200 is cut like a block – rather than tapering at the edges – that extra millimetre it has over the iPad 2 doesn't count for muc. In fact, it feels very slightly larger than many of its rivals. However, unlike the iPad and Galaxy Tab it includes both HDMI-out and a USB port, and at 535g it is light, while the brushed aluminium back gives it a classy feel.

Toshiba AT200 – screen quality

The 10.1in, 1280x800 display is a standard size for tablets running Android 3.2 (Honeycomb), but the Toshiba AT200 is in danger of selling itself short on quality. While most tablets at this size and price feature an IPS display for rich colours and wide viewing angles, Toshiba's screen is a much paler TN LCD affair.

Toshiba AT200 – software

Toshiba doesn't make any attempt to customise the Android 3.2 interface (and makes no mention of Android 4.0, Ice Cream Sandwich, at all), but it does supply a healthy suite of software with the AT200. ThinkFree Office is one of the better productivity suites available for Android, while the built in media player is slick and handles UPnP sharing duties for streaming files around the house.

Toshiba AT200 – camera

The 5MP camera on the back of the AT200 has a wide angle lens and takes fairly decent snaps, if you don't have anything else to hand. Its 720p videos are a little jerky, though, and there's no built-in flash either. The good news is that the most important camera – the front facing one for video calls – is very good compared to its peers. A high 2MP resolution will have every blocked pore on display next time you Skype mum and dad.

Toshiba AT200 – performance

Just as Motorola did for the Xoom 2, Toshiba has chosen Texas Instruments' OMAP 4430 dual core processor running at 1.2GHz to power the AT200. It's a snappy chip in general use, although it suffers from the problem that more games are optimised for Tegra tablets than other chips, and it lags far behind the quad-core Tegra 3 in the Transformer Prime. Battery life is also disappointing, running for just five and a half hours in our standard video run down test.

Toshiba AT200 –verdict

Yes, it's thin, well connected and it looks great. But that's not enough to make Toshiba's AT200 competitive enough at the price. If you’ve got £400 to spend the Toshiba is nice, but we'd rather go for the screen quality and battery life of any one of its cheaper rivals – like the Samsung Galaxy Tab 10.1 or Apple iPad 2, or perhaps the quirkiness of the Eee Pad Slider. The AT200 is a nice enough device and clearly in the top tier of tablets, but with so many to choose from we can afford to be picky.

Stuff says... 

Toshiba AT200 review

A fine tablet, but with quad-core ICS devices with better screens available, it’s hard to justify the price