I have a 09 15" pro with the old c2d in it and I needed something that would process HD video a lot faster (it takes forever to render out project in final cut x and is to laggy to edit while still importing huge files). I decided to go w/ the $1500 13" model and thought if it doesn't run smooth I could return it and get the baseline 15". This i5 and ssd drive are fast as hell. Being able to edit while still importing is great (files importing quicker anyways, but I hated waiting around on the old one for it to finish) This thing is great so far the new display insanely crisp and it handles every task I need it for pretty great. I like the added portability aspect of it too. The 15" is better if you don't ever hook it up to a external monitor at home, but this is easier to take to class. I was looking at the air at the apple store, but this one is barely thicker and the better gpu and cpu made it kind of no brainer to get this one. battery life is great too. The non upgradable internals is the only downside (for me) with it. Also off topic, but I love the high resale value on mac's. I got $700 for my old one to drive the cost of this one down.