We had a pretty severe infestation of yellow jackets....inside our house! We couldn't figure out how they were getting in, and there were at least 20-50 we were killing every day. I called ARMNS and talked to Al, the owner. He knew immediately what the problem was and instructed me to go outside and try to find the source where they were coming in. He come out the next morning (a Sunday) and treated the nest with an injectable powder. It was pretty amazing.....there were literally hundreds, if not thousands of wasps, that came swarming out. He told me to call if we still had any after 48 hours. Unfortunately, we did...just a few....but he came back out right away and did another treatment without charging us. 24 hours later, it seems the problem has been resolved. Al couldn't have been more knowledgable and professional....a very nice man. I highly recommend ARMNS.