Bates Technical College is one of the few schools offering courses in audiology on the West Coast. It is a hidden gem for hearing aid wearers. They provide expert hearing aid repair, adjustment and sales. Because this is a teaching environment, you will find that it may take longer to get things done but you will also get expert help without a profit motive being the number one priority. Work is performed by students under the watchful eye of an expert instructor. I have been taking my brother there to maintain his hearing aids, which he originally purchased in New York City. They have corrected the errors made when he originally purchased his hearing aids, improving his hearing. While we were have his hearing aids adjusted, the instructor mentioned that my hearing aids did not have the proper length hearing tubes. I had Costco install longer tubes on my hearing aids and noticed that my hearing was improved. The school has limited clinic hours and as stated previously your appointments will take more time than a commercial hearing aid company. If you have the time you will get better hearing results, if my experience is typical.