Summary: I am very impressed with this network drive. It has exceeded my expectations and left me completely satisfied. I've had it for a couple of months now and no issues whatsoever. It was easy to set up and is a quality piece.
Summary: Bought this for back up for my DS214+. It was easy to set up and can be an additional RAID volume or 2 additional single disk volumes. I'm not sure why some are complaining about the plastic housing.
Summary: I have this connected to my 214DSplay, and it works fine. I have 2 4TB WD Red Drives in each unit, and I use the entire 8TB on the main unit, and I back up that data on Volume 2 on this one which is configured in the Synology Hybrid style of things.
Summary: I love all of their products. This allowed me to easily expand a client's DS710+ that had 2x4TB to 4x4TB of storage. Just plugged into the DS710+ with the provided custom eSATA cable and you are good to go. The custom eSATA cable contains thumbscrews that hold the cable SOLIDLY in place.