I've used Paul for Rolleiflex service and he did a nice job. He excels in lens repair for LF too. I've used Harry too. Harry is worth EVERY penny.
I'll put it this way: the auto mechanic down the street who's been around for years and will work on many brands and models does a good job and people are happy with him. The one who works on nothing but BMWs and has done so for years may charge more but all he sees are BMWs all day. He will find things wrong on your BMW, that could be important, that the first guy did not even know to look for.