How much performance can you expect from a 6W chip? We've managed to get our hands on Sony's lovely-looking Vaio Tap 11. Introduced to market as "the world's thinnest Windows 8 tablet PC," this intriguing ultra-portable device promises "tablet convenience with PC productivity" and, on the face of things, looks to be a serious challenger to Microsoft's Surface Pro 2.

Well, it's not. After just a couple of days of use, we've come to the conclusion that the Tap 11 is too compromised to warrant serious consideration. Build quality is mediocre, the plastic flap covering the USB port is nothing short of horrible, the stand doesn't prevent the tablet from toppling, it's virtually impossible to use on your lap, you can't physically connect the keyboard during use, the pen hangs onto a weak clip just waiting to be lost, and to wrap it all up, it costs £1,050 for a Core i5 model.

Such poor execution of what seemed a sound idea makes Sony's exit from the business a little easier to stomach, yet our time with the Tap 11 wasn't entirely futile. Looking past the usability blunders, what makes the Sony tablet interesting is its use of a Core i5-4210Y processor.