I decided to upgrade the hard drive in my Macbook Pro 2.4ghz laptop. I went with a 320GB 2.5″ Seagate Momentus 7200.3 7200RPM after reading some positive reviews, plus it was 7200RPM and double the size I currently had.
I followed the guide from ifixit.com which really helped, I kept the screws by each step on the printed out directions so I didn’t loose them (they are small). I also used a towel to protect the top of the MacBook Pro and to catch any screws.
The hardest part was getting the keyboard cover off and then back on again, there are small plastic clips on the front of the cover that need to be gently popped up. The ribbon cable on the hard drive was also glued down with really sticky glue and it had to gently be worked worked off the old hard drive.
I definitely notice decent speed increase in file transfer speed with the new drive and its quite. It was worth the money and the 30 minutes it took me to install it.