I strongly agree! Matt is awesome and kicks ass! He always helps out and provides clear friendly answers. If you compare WHMCS to any other billing system like Modernbill and AWBS it is no contest. WHMCS is pretty simple (for a system this complex), low resource requirements (Modernbill is terrible especially 5.x) and is the most logically laid out billing system I have ever seen. The more I use the system the more in awe I am over the logical design.
Matt and his team seem to almost thought of everything. I mean things like actionhooks and easy integration with like "everything". I wrote a custom server module for our application in like 30 minutes. It tooks me days to get something sort of working with Modernbill and I had to eventually pay $300 for a support call. I even got a custom integration with iDevAffiliate so the systems "talk" to each other back and forth in less than a day.
Of course any software has room for improvement, even the things I program, but by and large WHMCS is so far ahead of the competition. I would even put WHMCS against major systems. If WHMCS would offer a MySQL InnoDB option it would have true transaction support and could compete directly against major billing systems on the IBM type level.
So if anyone reading this is debating WHMCS the support is ahead of almost all companies on the Internet period and the product rocks! My only "compliant" is they should have showed up sooner! ;-)
Thanks Matt (I haven't talked with Joe or others). You have a long time customer here!
Jeremy