Was on windows 7. Now on 8, because it boots in about 5 seconds. But with the XBMC shell, so no windows tiles.
No lag at all. It's smooth. Have you read up on the XBMC site? Lots of tweaks to get it working. Although I think mine worked without much fiddling.
XBMC works really well on it (Acer Revo 3700). Nothing really wrong with it.
It's just the Ubuntu 12.04 LTS OS that can be laggy at times. The description said it was a dual core machine, but I suspect there are 4 cores inside because the task manager shows CPU 0, 1, 2 and 3 usage. Probably due to the Intel Atom CPU being low voltage and energy efficient.
