We use pfSense at a client of mine and it's great. I didn't have any prior experience with it but I only spent a couple of nights setting everything up. We use it to manage firewall rules and as DHCP server for 2 VLANs.

We've used it for about a year now. Had several power outages. The pfSense box is still running like a champ, no problems whatsoever.

Turns out my client actually wanted an email spamfilter though, but our mail is hosted in another country so I had a little trouble explaining why our internal pfSense couldn't help us there. Oh well.