The salesman recommended two exterior treatments to get rid of the hornets/wasps. The main nest was on top of the garage, two stories up, and we could hear them in the wall between two of our bedrooms. They scheduled us very quickly and we haven't seen any hornets/wasps inside since the first treatment about 10 days ago. The first treatment took about 30 minutes and the second, 6 days later, took about 10 minutes. The two reasons for the B rating, not A, are that the salesperson said they would warrant the work for a year, meaning until Dec 31 of the current calendar year (I asked for clarification), but the contract e-mailed to us specified 30 days. In addition, the person doing the second treatment didn't have a ladder, and was using some spray thing to shoot liquid up. It seems unlikely that the main nest actually got hit a second time, since it was on top of a two-story roof. We were also hoping they could either block the hole that was allowing insects into the house or at least tell us what work might need to be done so we could hire someone else to do that, but since the 2nd person didn't have a ladder, that didn't happen either. Also the 2nd person said he couldn't understand the notes the first one left, which seemed odd. Overall, the immediate issue was satisfactorily resolved, however.