DR Pooper Scooper

We used Dr. Poper Scooper for about 6 months and he did an ok job but he would miss a lot. My yard is fairly small (about 20' x 75' max) and he would be done in about 5 minutes. The rate charged specifies that it applies up to 15 minutes. My wife and I would often go out right after he left and have to finish the job ourselves. My wife and I only have several small dogs.