System Admin and Instrumentation Engineer
I find FreeNAS easy to implement, easy to manage with its beautiful web interface, and an overall feature-set that cannot be beat by an off-the-shelf unit. Ease of expansion in DIY projects is a must and I don't know if I have seen the limit to what FreeNAS can provide thus far. The team has provided extensive documentation and any questions beyond the documentation have probably already been answered by the community in the forums. ZFS is integral and you are hard-pressed to find another product that can perform like FreeNAS given its featureset. I have tried all the options available out there for a home-built NAS device and to me, FreeNAS is the most polished and easy to use system available. It will take a lot to get me to look at anything else ever again.