Summary: The drive is a great drive. The only issue I had is not the drive but a compatibility issue with my iMac. Don't get me wrong, am a Apple guy through and through, but Apple has reconfigured the hard drives they place in the computers differently for the temperature control fan. So if you are planning on replacing the drive in your Mac there are some technical things you will need to do, or purchase a fan controller utility.
Summary: This unit is the same model replacement for the original hard drive that failed. Physical installation took minutes. Installing Windows 7, several programs and the back up of data files went smoothly. The Seagate hard drive is quiet just as the original one. I am very satisfied that I choose the same model. It is as though I did not have a failed HD since everything is once more as it was.