Could be a good sign, if they are busy, means people are using them, give them a phone call, one I used only have about 3 guys and they are normally flat out.
Other way is to drop in so they can see the car and can give you a price, you can choose the tail pipe you wont, and there are quite a few to look at.
As I always think its good to see what the working conditions of the garage are like as it gives you a good idea what you will be getting.
Best of luck and hope you get it sorted.