Hey Guys, So today I upgraded my MBP's (3 years old mind you) Harddrive form 80GB to 500GB. I just followed iFixit's guide and everything worked great. What I did notice though was that the performance of the computer has increased x10. I no longer get the colored beach ball. It runs a lot better. This isn't just me, I ran xbench and scored a 123 where as previously I got 80. It wasn't that bad of a replacement. Though now I need to give my lid an extra 'nudge' for it to lock. Anyone else there have a similar experience? For those debating on whether or not to upgrade, I strongly recommend it.