Lets start off with the bad.
It is hard to find the shop entrance and they could sign it better.
Now the good
So I have a 2004 Honda civic. I normally take my business to Whitey's Auto Repair for all repairs. I did so this time as well but I was told that the noise that my car was making was from the exhaust system and that Scottsdale Muffler could do the job better as they were experts in this area. When I walked into Scottsdale Muffler (without an appointment within 2 hours of them closing) they got my car up on the rack and found the issue quickly. They were able to fix it that day at a more than fair price. These guys are good and they are pros. So if you are looking for Muffler work you could not do better than Scottsdale muffler. (side note there shop floor was clean)