I've read that only about 30% of audiologists use real ear measures - most believe that this is not needed due to the programs provided by the hearing aid companies. My audiologist told me that she had used it and got a worse result than the Oticon programs. I kept pushing and now she has told me another audiologist in the office is using the real ear measurement and has the only device in the office to do so, so I'm going to that audiologist next time to see if it seems to make a difference for me.