Well you have done the right thing to name them. If you use another canvassing company make sure you call all of them and go with the one that you feel you can trust. They all do a test night, get them all to do a test night, meet all the people in person, look at the quality of work that they get you on the individual nights. Alot will tell you that they can get 200 plus worth of jobs a night, its not down to the quantity of the work they get, its the quality. As i am in no rush for alot of work in one go, i have them working a night or two every other week, but i get quality work, and so far have had no cancelations!!