ive used streamline for almost 10 years. ive used other shops on occasion(utah imports, alex's auto haus, strong audi, etc), because its true.. they do get busy. but thats because they are the best.
when i finally sold my first audi, i specifically looked to buy another or a vw. that way i had a mechanic i could trust. my car is my baby, and i can easily say there are very few people i want working on it. but id recommend streamline anytime.