I have an E series VIAO I bought similar to this one two weeks ago. Got it for school mostly, nothing extreme. So far it's been good to me but I did have to issues:
1) Coming out of Hibernation, I had some weird lines on my screen that wouldn't go away without a restart. This would happen 4/5 times I use hibernation. After a windows update though, Never had it again. Something must have been outdated, (even though I got the thing two weeks ago...) or corrupted that thew window's update overwrote.
2) My WiFi would drop and my computer wouldn't detect mine or any other wifi hotspot around. Or even my PS3 that I leave on with remote start enabled. Turns out this was an outdated driver, fixed this just today with the help of SONY customer service.
I find it weird that on a brand new VAIO I had two issue that could be the fault of "Old unreliable software"... but other than that, it's been pretty sweet. Does everything I need it to do. Also, very stylish.