Attention:
Before migrating to RAID1 (or if the memory is to be formatted), back up the existing files and programs (Setup).
The negative:
Unlike the running noise, access sounds are clearly heard, and also easy to feel at your desk.
But this is important, however to the particular resonance of the desk.
Western Digital advertises that should produce less heat the plates installed the RED series than other plates.
However, in that respect I'm a bit disappointed because the plates make a good heat, similar to any other disk.
Therefore, the one point in the hood.
My Conclusion:
I would buy the memory definitely be back.
Western Digital has made an effort to bring a proper storage for USB 3.0 with the possibility to RAID1 on the market and well implemented.