Pros: Price. Easy to migrate from DS220J.

Cons: None that I know of.

Overall Review: Upgraded from a DS220J and added three more Seagate 4TB drives. It recognized the one migrated drive and retained setup and all DSM/SRM configuration data. Of 16TB total drive capacity, the RAID5 leaves me with 10.92TB. I use the NAS t store HD surveillance camera video files streaming from three cameras and it's been solid for four days now. No issues.

Shipper upgraded to expedited delivery for free. Drive works great.