One of the best things about Costco is their 6 month trial period. Most providers allow 30 days, which isn't enough time to really know how well the technology is working for you.

My husband has Costco hearing aids. He is very happy with them. But, he has a basic sensorineural hearing loss typical of aging. Costco has been wonderful about servicing them. We live in different places during the year and all have Costco available so he goes in regularly to have them cleaned, etc. No charge. So there are some huge positives there. None of those Costco stores have audiologists. They are all hearing instrument specialists. I believe they are trained by the few AuD audiologists that Costco employs. Training and internship. Ask your provider where he was trained, and what his degree is.

Telling you that you should be happy with what you're getting sounds a bit strange.

Let us know what you find out. This is a good topic for discussion. while Cookie Bite hearing loss isn't common, it's not unheard of. People need to hear stories like yours.

You might want to look at this YouTube by Dr. Clifford Olson. He is a doctor of audiology who has a lot of good information online. https://www.bing.com/search?q=real+ear+measurement+dr.+cliff&form=ANSPH1&refig=716837933eb5452f8a4b522cf2d6fc72&pc=U531

Phonak is generally a good hearing aid. What model of Phonak hearing instrument do you have? Did they do 'real ear measurement' when testing you?