Daniel has them..his are the digital...not sure if that is the FM ones you are talking about. His are the ones that fit over his ears. He has autism so it has been a little harder to get him to wear them except when he wants too..

but he has did quite well with them. The biggest thing to worry about is them taking them out and fooling with them or laying them down, that and water is the number one worry especially in the summer. You have to make sure they understand if they are around water play/pool etc. they have to come out..

And to remember to check they are out at nite when they bathe or shower. Most give a year replacement if they are lost or damaged. But only a year. I personally watch those things like they are a fourth baby around here. I always know where they are and they are always put back in the cases when they are not in the ear. They are easy to take care of for the most part. But I had experience too from Daddys hearing aides. I swear he was worse then any kid with messing with them!
any questions I can try to answer..