I have Phonak Audio Marvel's, 2 years old. I also had been trying to use the Restaurant Program in the phone app, but it really didn't work in loud venues. It was ok in a quite deli. So I bought the Roger On at the recommendation of a fellow HOH person. We like to go to a local craft brewery, but it is very loud since it is also a sports bar. Prior to using the Roger On, I could hear an occasional word from my wife and daughter, but otherwise I had to sit and watch the games while they talked. But when I use the Roger On, I can now hear them over the loud restaurant noise. I am guessing it is picking up their voices since they are the closest and feeding that to my HA's while suppressing the noise in the background. The background noise doesn't disappear, but their voices win out. It also has helped tremendously with Board meetings where I put the Roger in the middle of the U-shaped tables and cannot hear the soft spoken women on the other side much better.