There is a section in the forum here about medical billing software, you may want to take a look at the posts there for some ideas. I have not heard of the software you mentioned, so I can provide no advice on it.
I will say this, often the client will already have a software and clearinghouse in place, and you simply use what they have. Saves you money on overhead, and it is easier to learn what they already have, then to convert them over to something new. All the billing companies I work for just use the clients software.