I have done two of these and since I already am a hearing aide wearer, they were super easy.
Getting the appointment is the hardest part but if there is a long wait time for an appointment, tell the scheduler and they may extend the date. I had to wait 2 weeks for one of the appointments and the date was extended for me.
Once you make the appointment, you can expect to spend up to 1 hour there for a hearing test. So if you hear really well, you might want to bring someone who does not.
The report and shop are very simple. You really let the other person just do their job. They will test your hearing, explain the results and then they will try to sell you a hearing aid. You need a business card and a brochure of whatever they try to sell you. Try to get more than one recommendation but it is not required.
You are supposed to ask about over the counter hearing aides and see what they say about them.
I feel it was very simple but it is natural for me since i have a good amount of hearing loss. The shops were also approved fairly quickly without question or issue (shocker). Hope that helps.