I am not sure why whould any body pay a clearing house a 100-200 dollars a month if other clearing houses charge nothing . Two example 1) Office ally (whether you use parctice mate or uploading the file from your current PM softwere) 2) avility.
I have an exellant experiance with office ally I am using their practice mate as a PM softwere. They have excellant support service and training. always some one answere your phone in a 1-2 minute and also at no charge and unlimited.
I have been using office ally since January 1, 2011.
That is my personal opinion. A $ 150 /month is a lot of money in comparison to the big zero.