Pros: Feature rich (iSCSI, CIFS, snapshots, app support), good GUI, two ethernet ports

Cons: RAID 6 (5+1) is not supported. With 3TB drives, one disk failure can mean a long re-sync when the drive is replaced.

Overall Review: I have been much happier with this unit versus Drobo. Better price, more features, no resource-hog software that the client must run (drobo does). Well constructed, and the screen is nice too.