TrustedReviews have looked at the Western Digital My Book Pro Edition II.

The Western Digital My Book Pro Edition II is the first external hard drive we've seen that brings RAID and Firewire 800 to the desktop. It's stylish, quiet, and a breeze to use and, if all you want is data security then it's definitely worth considering. However, if you just want a large and fast external hard drive you'd be better served by a single disk solution.

Western Digital My Book Pro Edition II Review