I've got the Phonak Bi-Cros and like them pretty well. As others have said, one of the drawbacks is if you run around in bi-cros mode (which I do most of the time), you pick up the interference for a second when you enter stores as you pass through their security bars. I also work with computers and pick up some of the high-frequency noises they make as they boot up for a few seconds until they are totally up. I don't have molds in the ears, they have just a slim tube that goes down to the small plastic dome that fits just inside the canal. I forget I have them on most of the time they are so light. My audiologist gave me 5 modes: default "on" just for the hearing side, bi-cros mode, a secondary bi-cros mode where the good side is toned down a little bit (road noise) to make conversation with people on my right side in the car a little better, mute, and the t-coil mode. I can't say enough good things about the t-coil mode; this is the mode I go into when I'm paired with my bluetooth neck loop (that is in turn paired to either my phone, or computer. In fact, I "looped" my living room and bedroom so that I can be anywhere within the loop and ithe tv feeds directly into my hearing aid. I also have the clipboard portable loop that has a microphone that helps in conversations with people.