Phonak has had the same system out for a while now in their Paradise hearing aids. I tried them 6 months ago. There were two problems.
First they could be very noisy on the other end. Since the hearing aid microphones are used to pick up the users voice they also pick up other ambient noise so the person on the other end hears all the ambient noise from the users end of the call.
Second the system was unstable. It would randomly drop connections and change programs with no input from me. The phone app that Phonak had then was awful. I think they have improved it now.
Even though my phone and hearing aids are new enough to support this system I'm not really interested in getting it. I think that the problems are indicative of the problems that will come with the new Bluetooth LE that they say will replace hearing loops. They have a lot of problems to work out before we see reliable Bluetooth LE audio.
