Summary: It's still a good HD to go with, specially this days, if you want an HDD that will only store documents, movies or music, etc, it's a very viable and reliable HD, there are new HD's that will be much better for though environments, but as storage unit, like I use it now in the HD enclosure, you will...
Pros: This coming November will be the HDD 4th anniversary and it's still working like day 1. I have reformat the computer several times and it's working perfectly
Summary: I wouldn't put all my eggs in one basket with any hard drive. These are reliable for sure with some layers of redundacy.
Pros: Still work fine after 4 years.
Cons: The number of bad sectors is slowly increasing on these drives (of which I have 2), but they've been otherwise reliable. I have lost a couple large files (5+ gb) due to corruption, but I've always had back ups so no permanent loss.
Pros: Western Digital no longer makes the green line, but the Red drives are pretty much the same and I only buy Red Drives now for media storage. The Green drives I got were only 2TB (the biggest available at the time) which is the only reason I don't use them any longer.