I know lots of people are considering this hard drive at the moment, so I thought I'd rate it on speed, noise and power consumption.
For speed, it is pretty good. I noticed the difference on startup, as my 13" MacBook Pro starts up in 15-17 seconds instead of 25-30 seconds. Opening applications was slightly faster, but not considerably. However once you have opened it once, then closed it again it opens in under 2 seconds until you restart. My old hard drive certainly didn't do that
As its a 7200 RPM drive, its a bit louder than my old 5200 hard drive. There is a tiny bit more vibration when its on desks too. Personally I don't mind the noise. I actually like it a bit, it makes you feel like the hard drive is faster and more powerful
For a 7200 RPM drive it is very good with power. In fact, so far my battery life has improved a noticeable amount
I am very pleased, as I was expecting to see my battery life suffer 
For speed, it is pretty good. I noticed the difference on startup, as my 13" MacBook Pro starts up in 15-17 seconds instead of 25-30 seconds. Opening applications was slightly faster, but not considerably. However once you have opened it once, then closed it again it opens in under 2 seconds until you restart. My old hard drive certainly didn't do that
As its a 7200 RPM drive, its a bit louder than my old 5200 hard drive. There is a tiny bit more vibration when its on desks too. Personally I don't mind the noise. I actually like it a bit, it makes you feel like the hard drive is faster and more powerful
For a 7200 RPM drive it is very good with power. In fact, so far my battery life has improved a noticeable amount