I can sum it up in one word: "WOW" I cannot believe how fast this machine is. I am coming from a 12" 1.33ghz G4 iBook and this things screams (that's what Steve would say). For the first time the other day I feel as though I actually experienced fully what Macs are all about. This is after owning my iBook for almost 3 years. Screen: I got the matte version and boy is it beautiful. The 15" seems like a monster compared to my 12". Also now I can use real screen resolutions, not just 1024x768. I don't seem to notice any yellowing, but I'm not going to test for it. If I don't see it, it's not worth pointing it out to me. Speed: The speed of this machine is unbelievable to me and I even got the 2.4ghz model. I still can't fathom the concept of apps loading in 1 bounce or in just a few. I haven't put the machine to any rigorous day to day activity that much yet, but I feel it won't be a problem. Temperature I haven't noticed the MBP getting too hot when I use it. The only hot part on the top that I can feel is right above the keyboard towards where the screen connects. The bottom is a little warm, but it's not bad. I don't know of any other big topics off the top of my head. I just wanted to tell everyone that if you're leaning for a new machine, buy one. I am 100% satisfied with this machine and it'll do all I need plus more. I just wanted to share my thoughts because I know it was always helpful to read other peoples' real experiences with new products. If anyone has any questions for me I'll try to answer them.