I'll do a summary of each model first: 13'' + Significantly better CPU's, they really hit it out of the park in this respect, i never expected an i7. - Weaker GPU - Same or worse battery life. - No 1440*900 option like the 13'' MBA (the biggest WTF) - No fairly priced SSD options. - No design change or major innovations 15 and 17'' + Fantastic CPU upgrades + Decent GPU's, good upgrade on the 17'' + Good battery life - No design change or major innovations It really is as if Apple just don't care about 13'' buyers, and they're attempting to shoe horn them into either the 15'' MBP or the 13'' MBA. That's all well and good, but the leap in performance between a 1.8Ghz C2D and a Quad Core Sandy Bridge processor is ludicrous. I sold my 2010 13'' model in anticipation of some decent improvements, particularly in regards to battery life. I assumed that because Apple were relying on the Intel 3000 chip with regards to graphics that battery life would be improved, i'm now at a loss as to why it isn't significantly better. The 15'' and 17'' models are really exciting, particularly with regards to the new CPU upgrades, if i was a 15'' or 17'' buyer i would be extremely pleased right now. I just feel as if people looking forward to the 13'' MBP have been totally and utterly shafted, and i am now at a loss as to what to do. The MBA 13'' is a nice computer but it's 1.8Ghz C2D is underwhelming and is already very outdated, i imagine Apple will refresh the MBA's this year with some Sandy Bridge love, at which point the current models will nose dive in value. I get the feeling that a lot of people on this forum feel really disappointed with the newest 13'' model, and i can't say i blame them.