I have had two TD-H3s for two weeks, I am a noob GMRS user and have found them to work great.
I've used CHIRP to program them, have used the face keyboard on teh radios to program them, have tried the odmaster phone app and... prefer CHIRP but it worked. I've dont the firmware updates - very easy no problem.
as a complete noob... I have found them to be very easy to use and they have given me no trouble. Yes, there was a learning curve but I attributed that to my general noobieness. and yes there are a few quirks bout the radio that are a little tricky to understand, like the strangely labeled settings for listening to the A and B bands or setting it to show only one band, but on the whole I have found them easy to use and work with.