I've had FreeNAS running on a 2U Supermicro box for a year and a half or so (I ran FreeBSD on it prior to that). My needs are pretty simple and I don't need 90%

I've had FreeNAS running on a 2U Supermicro box for a year and a half or so (I ran FreeBSD on it prior to that). My needs are pretty simple and I don't need 90% of the features either. I only use iSCSI (for the VMware servers in my lab) and NFS (for pretty much everything else); occasionally I'll rsync my workstation's files to it for an "extra" backup. I've got automated ZFS snapshots set up and when I finally replaced a failing drive -- just two days ago, I think -- it was a fairly simple matter. I updated it to the latest version of FreeNAS and that was simple and straightforward too. FWIW, this box isn't exposed to the Internet. In fact, it doesn't even have a default route; besides, my router / firewall filters outgoing traffic too -- not just incoming. I could have just used FreeBSD and configured the pieces I need instead of using FreeNAS but it's been quite stable and reliable and has mostly been a "set it up and forget it" experience.