First, the eye glass adapter did not work at all on my prescription glasses. However, using the ear piece and wearing my glasses worked just fine. I have a SLVR phone and this system works great with my phone. I can hear very well while using it, even with one of my three kids screaming in the back ground. I mostly wear this while driving around, leading a Girl Scout troop and working at my daughter's private one day a week school. I do haven't had any issues with it at all during any of these times. The only thing that I dont like about it is that it is hard for me to remember how to place a call on hold or mute without hanging it up instead. Other than that, I have been VERY happy with this set. I have had it for about 1.5 months.