This hard disk was an upgrade to my son's several year old gaming rig. The PC was pretty state of the art when we bought it, but is now increasingly becoming out of date. The original hard disk (also a Western Digital) was 250GB which felt huge when we bought it, but is really not enough these days.
The first thing to point out about this hard disk is that it is an OEM model, so you only get the disk and no cables or fitting kit etc. For a SATA power and data cable you could try this which I also bought and which worked perfectly: Wired--Up 1 SATA Power Adapter Cable and 1 SATA Data Cable
The PC in which I fitted the disk only has a SATA 1 (150 MB/sec) controller, so I was a little concerned that I might not benefit from the full potential of the drive. My basic test of start up and shut down speeds showed a pretty dramatic improvement though!
Start-up (on a reasonably new installation of Windows 7, from power on including POST checks to usable desktop) - 1 minute 32 seconds.
Shutdown - 15 seconds.
Start-up (new install of Windows 7, from power on including POST checks to usable desktop) - 50 seconds.
Shutdown - 6 seconds.
As you can see, the start-up and shutdown speeds have both improved quite noticeably. Games now load considerably faster too.
I should also comment on the packaging. I bought this drive directly from Amazon, not through the Marketplace and the packaging was fine. The drive was in a genuine hard disk transport box, that was then packed a second box with enough brown paper packed in to prevent the box moving around. - no problems at all in my opinion.
Overall: - 5 stars - A worthwhile upgrade on even a SATA 1 motherboard. The disk is not just bigger than the one it replaced, but is much faster and is quiet too.