How good is Top Notch Repair store

Hi, I just wanted to ask about the store Top Notch Repair in Charlotte town. I wanted to get my phone ear piece speaker professionally cleaned as I seem to only make it more dirty when I try to clean it. And wanted to know how good they are ? They seem to have high ratings on google reviews but I’m just a bit worried since I’ve not gone to a repair shop before for fixing devices. They said they will open it up to clean it and it just got me a bit paranoid and stressed. So I just wanted to ask others experiences with them.