I just ordered a third new internal hard drive for my 17" Unibody MBP. The first 500gb drive I tried, Seagate Momentus 7200.4, died after just over one month of service so I replaced it with the slower Hitachi version and it started sounding like an old coffee grinder after less than two months. I don't recall hard drives having this many problems in the past and it is frustrating to say the least. The folks at Newegg do not support the products they sell after 30-days so I am going to have to duke it out with the manufacturers of both drives. Meanwhile, I am curious what kinds of luck other people are having with hard drive upgrades in their MBP's.