I have been using Termagon since we moved into this house 13 years ago. They are resonable in price, and in 13 years I can't remember EVER having them come earlier or later than scheduled. The office is excellent with scheduling and giving reminder calls (which sometimes I need.) And most importantly, I rarely have had a critter in my house which is amazing with a hunting husband that tracks stuff in my home and a dog with a large dog door she uses all day long! Their product works.