They've been spraying at our house for over a year and we have been very happy. We had a horrible black widow problem, as in, we would kill a dozen a night on the back patio, within a week of them starting our service, they were gone entirely. And they haven't been back which is more important. We do sometimes get an earwig in the house but that's because I don't have the indoor service because I have a parrot. They always call me the day before to check and be sure it's okay to spray and remind me to leave the dogs in and they always leave my invoice on my door. I have not had any problems with them at all and I carefully read all warranties and fine print and think they are a good company. I also got quotes from other companies before going with AZ Exterminating.
I also love that even though the yard gets sprayed, I have not seen any dead lizards which is a good thing! We still have them on our walls and geckos in the garage which is fine by me. We don't have as many, which is also fine by me because it means there is less for them to eat which = fewer bugs! The only thing I am sort of sad about is that our lovely, roaming female wolf spider who would valiantly take down some of our black widows is gone and she hasn't been back with any offspring. My guess is she was an unfortunate unintended victim. :(