I think WHMCS is the far better CRM out there, there is very little as a system that it cannot out of the box achieve or be modified via modules or API/Action hooks (working on a few atm) to do which boasts for its scalability and easy customisation. Its very reliable and in the right enviroment very efficent... whats not to love

?
All in all a very efficient and a well designed system, although it's not perfect... but not far off
