Summary: I've run it both as RAID 0 (Stripe) and RAID 1 (Mirror). I have it in mirror now. It is only a tiny bit slower than in stripe, and is fully redundant. The Thunderbolt interface and 10k RPM drives make this thing almost as fast as an internal SATA drive. Sound is quiet.
Summary: I was going to send this drive back because I believe it misleads people into thinking it is a HARDWARE ONLY standalone RAID device... IT IS NOT!! This is simply two drives that have Thunderbolt interfaces to the Mac. All RAID is done in software within Mac OSX. That was upsetting.
Summary: Doesn't work in windows 8.1 on my MSI WS60 laptop workstation with Thunderbolt 2/1. The description says "may need to be reformatted for windows", but the support page says it's not supported in windows. The Western Digital description for the product is wrong (see included photo).
Summary: Amazing drive for video editing and anything where you need the disk speed. I tested 350MB/s or higher read and write using the black magic disk speed test. Using it for a 16+ angle multicam edit now (all proress 422 clips) with solid performance.
Summary: Very fast speeds, very good storage. It's a bit pricey compared to some other devices out there, but keep in mind that this is a 10,000RPM drive, versus 7200, which means you're reading and writing data faster. My only complaint is how loud it can be.
Summary: I bought this recently and one drive was failed yesterday.....(no more spinning sound) I took this as my bad luck and I am looking forward to putting it back to five stars later on after the replacement. So far so good after the replacement and I'm satisfied with the service.