I can only wear one aid, as my right ear is not "aidable." I spent $1,600 for a Bernefon Zerena (Oticon) at Salem (Oregon) Costco and have had amazing support from the fitter. I have Meniere's, have gone bilateral since buying the aid to combat age-related deafness in my "good" ear. That means that my "good" ear now has the same problems that made audiologists note that my right ear wouldn't benefit from an aid, but the woman at Costco is more aware of what's out there and the peculiar problems of Meniere's than either of the, ahem, audiologists at the CI hearing center! She is aware of Live Transcribe, which neither audi knew about. Both audis are totally clueless about Meniere's, but the Costco fitter understands and works hard to make it possible for me to be part of the world. FWIW, Costco sells Phonak, as well as several other brands, generally for about half their cost elsewhere. Unfortunately, not all Costco fitters are so willing to be helpful--at least there are some bad reviews of certain stores. I drive over an hour each way to reach the Salem Costco; if that person wasn't doing a superb job, I could drive a little further and have a choice of several other Costcos without affecting my warranty, free parts and adjustments, etc. The only thing I pay to get are batteries, and 312s are only $8.95 for six packs of eight at Costco--cheaper than a single 8-pack at the local pharmacy!