1) Being able to expand my array with different size drives 2) Snapshots I'm a new user who's coming from FreeNAS. I liked FreeNAS for its ability to store my data. However, when I wanted to start using it for other things (VMs, Plex Server, PiHole, VPN server, etc) it was waaaaaaaay easier to setup, manage, and learn about (Spaceinvader One videos and community support!!!) with unRAID. unRAID is well worth the cost.