The Synology DS223 is a good entry level NAS that offers a good solution for a home backup system and a good introduction into the Synology DSM.
Synology DS223 Review: An Excellent Server
Synology DS223 DiskStation 2 Bay 3.5 Diskless 1xGbE NAS (Tower)
Synology DS223 NAS Review – NAS Compares
Synology DiskStation DS223j 2-Bay Home NAS Review
Synology's New 2-Bay DS223 NAS Promises Simple Data Management
Synology DS223 Review: An Excellent Server
Synology 2-Bay NAS DS223 (Diskless) : Electronics
Synology DS223 NAS Review – NAS Compares
Synology DS223 NAS Review – NAS Compares
Synology DS223 NAS Review
Synology DS223 Review: An Excellent Server
Synology DS223 Review: An Excellent Server
Synology DiskStation DS223j 2-Bay NAS Review!
Synology DiskStation DS223 review: Compact and efficient!
Synology DiskStation – “Nothing short of a game-changer”