The only thing I was worried about buying a 2011 MacBook Pro 15" was the battery life - I heard the normal battery life web browsing, bluetooth off, 50% brightness was like 5-6 hours. My brightness is a couple notches below 50%, but still perfectly readable, running just Safari and Microsoft Word throughout the day, Click2Flash plugin, and adblock extensions, I have been getting 6-8 hours. It basically lasts me a whole day of lectures. Fantastic. Now the only thing that I wish it had was a 1920x1200 resolution. A third party upgrade solution needs to come out. The screen quality is fantastic, however.