Good groomers are as hard to find as good hairdressers! One way to look for a good groomer is to keep an eye out for yorkies who looked well groomed and get referrals from their owners.
I have a great groomer....I still sit there with my pups when they are groomed. I will not leave them anywhere! Aside from bad haircuts, many other things can happen and I just will not take chances, no matter how much I like my groomer. Call me the over protective mom!