As numerous people have pointed out, Walter's is indeed a great repair shop. Tim (Walter is his last name) and the rest of his staff are friendly, honest, professional, and reliable. I highly recommend this shop for repairs, maintenance, and check ups.
However, they are victims of their own awesomeness. The waits here can be long--2 weeks or more--due to how busy they are and they only have one bay. If you do have a pressing safety concern though, Tim is always willing to take your car for a spin or do a quick diagnosis to let you know if something needs to be taken care of.