I am an IT manager working for a group of companies, and have been using these devices for about 2 years. We run 22 of them 24/7, that's 88 hard drives. We have had two of those drives fail in that time, but as they are raid 5, you just replace the dead drive, and rebuild. This is pretty much idiot proof. We run backups to them as an addition to our offsite tapes, and store application media and data images on them. Not one of them have ever lost data. It is fair to say that I would not hesitate to recommend one.