I had complete confidence in her without any referrals from someone getting them done for CIEM's. I told her what they were for, she has heard of them and with the instructions I like to think most of them will do a fine job. Is it a perfect world, of course not, but its not like they are doing heart surgery, they are squirting stuff into your ear. Follow the instructions take your time understand what they are for is about all we can hope for. Call some of them in your area, talk with them, let them insure you they understand and then go for it. I have watched people do them at CanJam, I couldn't tell you if they were audiologists or not, but even I could learn how to do impressions.