I have the 500HD version of this device and the added storage capability is important to me, as I don't want to carry external storage on business trips. I can confirm good battery performance, I get a bit more than 6 hours for office work / wifi surfing (unecessary things like Bluetooth turned of, 30% display brightness).
The test mentions the keyboard as weakness, I don't seem to have this problem (or I'm used to these shallow laptop keyboards, I think it is mainly a problem if you are used to traditional desktop keyboards).
The trackbad could be better though.
A display resolution of 1600x900 would have been awesome, the only real drawback I see for my needs. (in the office that's no problem as I use external monitors).
Overall I'm very satisfied, I needed a 3G laptop and only few choices are available here, like the expensive X1 (with less battery runtime) or the z930 with awfull fragile display, so the U772 was the best compromis. 4 of 5 stars!