We have done theraputic listening with my son on and off for a while. When he does it consistently, it works great! We notice that he does not object to loud sounds as much and is able to modulate his own volume much better. The challenges are
1. Finding the time to do it. It's supposed to be done for 30 minutes, twice a day, at least 6 hours apart. For us, that means squeezing in time before school (the headphones are too bulky to listen while he's getting dressed) and after dinner (we both work jobs until 5 or 6), adding it to homework, bath, chores, etc.
2. The headphones themselves are bulky, and the music might be a little uncomfortable. In any case, he doesn't seem to like listening much and it can be a challenge to wrestle him into those headphones.
Good luck,