I agree that each one is different. I have had my Cody groomed at my Petsmart for 3 years. Never any trouble. All the people are older and have been there a while. Always the same people at my Petsmart.
We do have a new Petco near us that I have been thinking about just because it is about 10 miles closer to me than the Petsmart. But I don't know if I will try it yet.