Yesterday I finally replaced my stock 5400rpm 250GB hard drive with a 7200rpm 200GB drive I purchased 2 months before I got this awesome MBP. I used the instructions from iFixit's website and it all went easily without a single issue. I think it was harder for me to find a T6 Torx screwdriver locally then to actually replace the drive in my MBP. I just wanted to comment on how easy it was to do and now I am pleased with the performance benefits I get now with the 7200rpm drive installed now. By the way, I have not noticed any extra heat from the higher rpm's and I have yet to work off the battery but I will let you all know if I see any noticable battery hits from it. Thanks for hearing my ramblings!