PC Mag: "I really liked the Western Digital My Book Mirror Edition, which yokes two 1TB hard drives together to provide a terabyte of mirrored (RAID 1) storage. Think of the Western Digital My Book Studio Edition II ($429.99 list) as the Mirror Edition's fraternal twin. But while the Mirror Edition emphasizes protected storage, the Studio Edition II is all about speed and capacity. It is Western Digital's most connectable external hard drive, and also one of the highest-capacity drives available. It's just the thing for video-heavy creative types who would enjoy having 2TB of transportable storage by their desktop. It's Mac-friendly out of the box, though it will work with Windows PCs, too. In terms of dollars per GB, this is more expensive than a single-mechanism drive but it's cheaper than a portable drive."