I had some problems with IMH.
Admittedly, I used it in an unorthodox fashion (I tried having the nurse use it to take history).
Still, I could never get the right balance of questions; either it asked too few or too many. I had a hard time customizing the questions, and I am not computer-illiterate.
I am also sorry to say that the tablet we were using it on to take history kept crashing, and this stopped after we uninstalled IMH.
Furthermore, when we would import the IMH history, there was always an invisible extra blank line at the end of the imported data. If you didn't manually delete it, it would make your notes look funny.
It wasn't worth $50 per month to me.
I think there is room on the market for a better version of IMH.