I have (08/14) bought two of these disks 3 weeks ago and exchanged my old six 2TB disks. Fan of Western Digital, I am a long time, but apart from that, I'm really excited. The previous speaker has, in my opinion, already said everything and I can only confirm. The hard drives are large (approx 5,5TB store net) and relatively quiet so. The write speeds are around 120MB / s and were easily recognized from my UEFI system.
I would buy the hard drives at any time.