I have been using FreePBX for close to three years. Some of the issues I have encountered have been the ones you hit your head on the wall until one of you gives up (the wall or your head). I just hit such an issue relating to a system which was gasping for air and every time I fixed one thing another would crop up. Things like, pri failures and locking the trunks, some phones not ringing, registration issues, Sipstation etc. etc.
I decided to spend the $$ and get some help from the Support Services which is displayed all over the place on the site. The tech I got Robert Keller was/is fantastic. A lot of our issues turned out to be networking related and he knew exactly what to do. Some of our issues turned out to be a little bit thornier but he stuck with it until our phone system was operational. It was a huge benefit for me to quickly get to the problem and get the system up and running and taking calls. Thank you Free PBX support and specifically Robert !!!
Seriously, I really do like a good challenge.