I've been buying drives from MDD for a while. Virtually all the drives they sell are decommissioned from enterprise environments. Some have tens of thousands of hours on them. I've had a few that only had a couple hundred hours on them. I've had a few failures over the course of the few dozen drives I've bought over the years. Returns are always quick and painless. Would I use this for a critical data or a client? Absolutely not, but I definitely use these for storage of home media and non-critical applications.