I've had my 15" Core i7 MBP for about a week now. I upgraded from my 2.8 15", and while the machine is more powerful I've noticed some odd changes that I'm not sure what to make of. 1. The battery life is about 4 hours. I've upgraded the hard drive to 7200 RPM, and to 8GB of memory. I'm not doing more than surfing the web and it's estimating the battery life at 4 hours (its been doing this consistently). I'm not doing anything more than I would do on my old 2.8 GHz, but the battery life is much much worse. I thought it was supposed to be better, and with the upgrades I was expecting about the same. Something is wrong here I think. EDIT: This is done on 1/2 screen brightness. 2. The second thing is my computer has been taking 5 to 10 minutes to startup. A bar will appear during the install. I originally thought it was possibly an update installing or something, but it appears not since it happens almost every time I start up OSX (ALMOST every time, doesn't happen every single time). I've taken a picture and have posted it below. Any thoughts are welcome, and I hope some light can be shed on what's going on with my mac here. Thanks!