Summary: The MacBook Pro worked fine when I received it, other than an intermittent whine from one of the fans and the battery needed replacing. I bought two new left and right fans, a new battery and a 512GB solid state drive. Then with the help of ifixit.com, went in and did the work. After the parts were installed, I divided the SSD into 8 partitions and installed Snow Leopard, Lion, Mt. Lion, Mavericks, the Yosemite Preview and that leaves 3 partitions for the future.
Summary: Apple computers put everything in one basket and never cut any corners when it comes to performance or reliability. We now have 6 different Apple products in our home and all of them are still working as they did when we first bought them.
Summary: i wanted something that was stable and could manage the rough work and constant beating by a dj, so i chose this product, my only dislike is the fact that the memory can't be upgraded to 8 gigs.
Summary: I'm a dedicated Mac user and wouldn't use anything else. Performance is excellent and there's is no negative I can say about the Apple Macbook Pro 15.4". The only Cons are in the latest software but great computer and hardly ever have any issues.