We have been using EZ Claims for two years. It is pretty user-friendly. You simply export data from AC to EZ and go from there. We bill electronically thru EClaims (a clearinghouse unrelated to EZ Claims) which works very well. There are some problems with EZ Claims as far as simple data exported(names backwards, insurance ID's flip-flopped) but your biller can correct these when reviewing charges for claims. It's cheap, some bugs, but for the price, it's fairly adequate on a small scale where you have the time to correct simple data imported. I know there are others out there who will add their experiences with different programs...