MadroosterTony,
We have played around with AWBS. The only issue we had is the template system. That did not work for our needs. It comes down to not which is the best billing software. But what is the best for your needs. Modern bill, WHM.Autopilot, whois cart, or even Client Exec in any situation could meet anyone's needs. Your preference, what you need, and how technical you are all depends on which one you choose. I have not found a bad billing system yet; however, I have found ones that I do not prefer to use.