I am working with a client and they use a very unpopular EMR system - that no one seems to currently integrate with. I want to use either OpenPracticeSolutions or Kareo for their billing and pm. Should I be so concerned that these systems may not integrate with their EMR system. Also, with Kareo, the demo suggested you can only set appts & register together in their EMR system. But again, they already have an EMR system.. Does anyone have any experience or advice about this...