Only two things are infinite, the universe and human stupidity, and I'm not sure about the first - Einstein
The Vaio Duo 11's built-in accelerometer, which ensures that the screen display rotates to whatever viewing angle you are holding the device, is not as responsive as in other tablet/hybrid devices we've seen, such as the Lenovo Ideapad Yoga 13. It takes a while to turn around from one position to the other and you sometimes have to go out of your way and lean it forward for it to come back to a horizontal view.
One other downside to the screen is that it attracts smudge prints a little too easily. Though this is expected with all touchscreen devices, in our tests we felt it showed them up a little more than other screens on the market, which made it look rather greasy. This isn't really an issue when the screen brightness is turned up, however.
Performance and OS
Running the Windows 8 operating system, the Vaio Duo 11 is powered by a choice of Intel Core I5 or Core I7 processors and up to 8GB of RAM. It costs £849 for the most basic Core I5, 2GB model, with prices jumping up by £320 for a Core I7 processor, and another £30 for 4GB of RAM, or £100 extra for 8GB. Windows 8 Professional is also available for an extra £40.
Our review model was an 8GB Core I7 processor model and scored a Windows Performance Index score of 5.6. The score is determined by the lowest sub-score, in this case desktop graphics performance, and not an average result of the performance of components.
Though the score was pulled down by the Vaio Duo 11's Integrated Intel HD 4000 graphics power, all other results scored much better, with processor calculations per second scoring 7.1 out of 9.9, disk data transfer gaining a 8.1 score and RAM operations per second earning a score of 7.9.
Unless you're using the Vaio Duo 11 for gaming on high graphic settings - which the device hasn't been built for anyway - you're not going to notice much lag, as in our tests both touchscreen and non-touchscreen operations seemed fluid, with the Vaio Duo 11 responding very quickly to commands. As an ultrabook convertible device, we found it will perform all your daily needs effortlessly. However, we tested a more powerful configuration of the Vaio Duo 11, so cheaper options might not perform as well as our test model did.
Overall, the Vaio Duo 11 handled the Windows 8 OS very well, with very little lag when swiping between pages, and programs popping up almost as soon as we selected them. However, after installing a good number of applications and storing a sufficient amount of data, we can imagine it will slow a bit.
Next: Connectivity, storage and battery life
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