Additional storage was required to record more HD television, especially during the 2012 Olympics.
Smooth upgrade process. I found that the ribbon cable was pre-formed in the kit I received -- nice touch.
Only one small piece of information would really enhance the documentation. Relocating the original hard drive support set screws in the case was frustrating until I turned the assembly upside down. Then I could easily locate the original hard drive holding the case in one hand and positioning the drive with the other.
This relieved obvious stress on the hard drive ribbon cables and provided the airspace between the drives to provide proper cooling.