I got Lion the day it came out, however have ran into an array of problems. At my University, all people who have Lion continue to discuss how much they loathe it, each with their individual reasoning. Personally, my MBP gets extremely hot and the battery life sucks. From 5 hours with SL, to 2 hours w/ Lion. Others hate expose and the odd arrangement of apps. --- Personally, the pluses aren't that pressing, though I do enjoy them. For example, I love Photo Stream with my MBP, iPad & iPhone........but ya know? I use my MBP as a serious college student and I feel that this quarter took a small blow in my productivity due to my OSX workflow being a bit odd; at the behest of Apple wanting all their devices to resemble each other a bit more closely.