Pros: I was a little concerned about the optimus nvidia, though there isn't out-of-the-box support for the graphics card if you run ubuntu or mint you can install ironhide which works flawlessly in linux to switch between the high performance nvidia and intel. With Mint "lisa" I'm getting at least 10hours of battery, gnome3 is beautiful. Some minor tweaking is necessary to get suspend to work, documented in the ubuntu asus U31 thread.

Cons: nothing bad to say