I've been working on it for almost 24 hours, here's a quick list of my impresions: good - - no whine - heat is same or less as my old 15" powerbook. definitely less hot than my buddy's 15" MBP. - feels snappy (opening and navigating in finder, sys pref is faster than pb) - not noticeable weight difference when I carry it in my backpack - NICE SCREEN bad - - noticeable weight difference when I carry it in my hand. (worth it in my mind) - mouse clicker rubs on side a little (hopefully this will "break in") - latch and closing clearance not as well done as on powerbook. - sleep mode takes a little longer to engage when I close the lid I think. Thats all I have for now. Overall, I am very please so far (knock on wood). -- J.