They fogged for mosquitoes and ticks about every 3 weeks during the 2013 season.
It virtually eliminated mosquitoes and ticks around my gardens, deck and pool. The treatments didn't harm any delicate plants, and though they don't sell this point, I think my roses were healthier reduction of other pests. The treatment didn't seem to cause any allergies or other ill effects. After some heavy rains, they came back to re-treat at no extra charge, without me asking. (Although, you can ask if you are having some kind of problem.) I highly recommend them if you are tired of mosquito bites.