I have tried many other products out there that do a simular job to WHMCS (which stands for WHM Complete Solutions[WHM is Web Host Manager, the back end for cPanel Control Panels]).
In the past I have tried 3 other similar programs, and none were as easy to setup and integrate than WHMCS.
I bought a Owned version, and also the Mobile Admin version, and also paid for their customization service. The purchase and installation was very easy, and their customization service, was excellent. Even when I changed my mind a couple of times, it was not a issue for them to make the changes.
Now to me, as I am not a programmer, and very little knowledge on stuff like, that, the BEST thing about WHMCS is their SUPPORT!!!!
The other three programs that I have used, all stated superior support, but WHMCS leaves them all for dead. Matt and his team are excellent, nothing has been too big of a problem for them. To me the main thing about any program, is the level of support behind the brand, and with WHMCS you can not go wrong. Even when a issue I had was not a WHMCS issue, they still helped me fix it, and all I can say about that is that Matt and his team, obviously care about their clients, and want to do what they can to help.
Thanks WHMCS, great product, great service, great Support, could not recommend higher!!!!!!!!