<p>I have a Powerbook and I love it. I take it with me to take notes in my chem class. It's light enought that I can carry it around in my backpack without noticing much of a difference in the weight and it's got a great battery life as well. I never actually shut the thing down, just close it when I'm not working and it goes to sleep. I can use it throughout the day and never have the problem of having to plug it in because it's low on power. I just charge it when I get back to my desk in the evening and I'm good to go. I have a 15" and I think the screen is definitely sufficient for working, playing games, watching movies, etc. I honestly wouldn't go any larger. Plus, the screen is clearer than my desktop at home.</p>