Cons: NAS keeps getting stuck at self testing when booted. Search google you will see many people are having the same issue. Support is not helpful and takes a full day to respond. Each they offer a meaningless troubleshooting suggestion.
Summary: Got this and put in 5 HDs off of their HCL. I would NEVER buy this again. Totally unreliable, from misreported drive failures to it's inability to bulk copy/move data without crashing. Until they have resolved the firmware issues with this box, I'd stay far, far away from it.