I just got my new 15 AluBook and Im so happy. Initially, I was very scared with all the reports about poor battery life, hinge problems, white spots, etc. But, as of today, October 7, I got a perfect machine, and even my battery life has been substantially higher than I expect it to be. Im very satisfied with my purchase. I dont know if people are getting 3.5+ hours of battery life with airport on, but Im consistently getting that battery life with settings for longest battery life. What I did is took the battery out when I got my book, used Ac to upgrade to 10.2.8, restarted, and I put the battery back on. I followed all the instructions on calibrating the battery, so I charged it and then drained until it went to sleep. BTW, My PB is a 1.2 GHz with standard config. without superdrive.