Summary: I hope I dont have to edit this later.... I have purchased at least 10 of these drives. None have failed or given me an issue. The RPMs are not 5400 as stated in another comment, but vary between 5400 and 7200RPM as needed.
Summary: It works perfect as a NAS drive as it should. I like the variable speed 54k thru 72K which helps with performance when you need it and energy savings when you don't. I do think it's just a bit pricy for a 1TB. but then again, not by much.
Summary: I originally bought this to replace my boot drive. It would work for a while and then shut down the machine. I changed it to be a storage drive. Again it works for a while and locks up the computer. I thought at first that I had a computer problem, but it only happens when this drive is connected.
Summary: The last thing I want is to lose a TB worth of data. So I bought this drive which is built for NAS and meant to be used very often. So I figured I'd pay a little bit extra to have my data more secure. In benchmarks, it seems to have performed better than other similar drives too.
Pros: Built to take a beating.
Cons: A bit more expensive than regular hard drives but not by much.