Pros: Easy to reconfigure to RAID 1 for Time Machine RAID 1 drives are hot swappable Thunderbolt allows up to 5 devices to daisy chain Fast Good value

Cons: None so far

Overall Review: I reconfigured the Duo tp Raid 1 to use for system backups. With redundant on site backups and a cloud backup I feel my data is pretty safe. The Duo has been running iMac Time Machine backups for several weeks without a hiccup. Backups are so fast and seamless I never know they are happening unless I happen to notice the LED on the front of the Duo flickering. Currently the Duo is daisy chained down stream from a 3TB Thunderbolt 2 drive. Both drives work flawlessly. I'm so satisfied with this drive that I am strongly considering getting another to leave in RAID 0 for rendering video.