I bought my MacBook Pro about 4.5 months ago and since I was so excited to get it, I couldn't wait on a custom order. So I picked up a 2.4GHz with 200GB 5400 RPM drive from an Apple Retail store. I've got a Mac Pro with a 320GB boot drive, and since the new Hitachi Travelstars came out, I decided to put an identical drive in my MacBook Pro so I can have all the same apps and files on my portable (without having to squeeze it all in). So last night I opened my MBP and installed my 320GB 7200 RPM drive. Everything went incredibly smoothly. No stripped screws, nothing bent, torn or cracked. I even avoided taking off the yellow tape that holds down the keyboard cable by propping the case up like a car hood. Now, I've always been a strong advocate of AppleCare on portables. No question about it, 90% of the time, SOMETHING will go wrong. AppleCare has saved my girlfriend several hundred dollars (First revision MacBook) and she's one repair away from just getting a whole new computer from Apple. But now I'm worried... Did I void my warranty? Traditionally, I suppose I did--I opened the computer. However, from everything I've heard, if something happened to my computer, I could put my old drive in and Apple would be none-the-wiser. Sure, I'd feel silly if I got a call from Apple with them saying "Well... It looks like you've opened the computer." But I would feel MUCH more silly if I had just spend $240 on AppleCare! So would I be pretty safe buying AppleCare, as long as I keep my old drive to put in? Also, since RAM is user replaceable, I don't have to worry about putting in my old RAM if I had to send in my MBP, right? P.S. (Rant) - How absurd is it that in a PROFESSIONAL computer, we need to be afraid of a voided warranty when we upgrade our hard drives? A CONSUMER computer (MacBook) even has a pull tab to easily slide the drive out!