Well, I must say: I'm VERY disappointed with the apple world!!!!! I'm a PC user and have decided to move to apple duo to several reasons among the most important one: reliability! I'm sick and tired of Windows bugs!! I decided to get a PB 15'' BUT I figured out, in time, that there's an enormous list of problems going on with this machine!!! It's unbelievable!! Problems that Apple denies to exist and even worst, can't get them fixed!!! It's pathetic!! I concluded that buying a PB 15'' is like gambling! You have to be VERY lucky to get one machine that won't break and let you down!!!! And it is unbelievable how can these "little problems" don't get out to the majority of consumers that still buying them!! JUST TO LIST THE WORST ONES: -Screen horizontal lines: UNRESOLVED -Lower RAM slot problem: UNRESOLVED -Stock battery problem: UNRESOLVED I'm still decided to get a apple's notebook but I have to admit that I'm afraid I'll have even more bugs than I have had with Windows!! At least, after 20 years using PCs (Dells, HPs and Toshibas) I have NEVER had such a huge list of problems in one single machine!!!