Microsoft's October-announced, February-launched Surface Pro has been doing the critical rounds of late, to mixed reviews. Folks love the fluid Windows 8 interface and the device's power, but they're not so enamoured with the bulky weight of the hardware, or the diabolical battery life. On the other hand, Lenovo's ThinkPad 2 is a complete reinvention of the ThinkPad – one that cashes in on the great features of its predecessor while moderately re-styling to avoid its flaws. But which is the best tablet? Find out in our review.