I've been with Irish Pest, Weeds & Termite for a few years now, and they've always done a great job. I use them for their pest control services, and I just recently signed up for termite control as well.
I think they really go out of their way to provide excellent service. For example, I once had a particular problem with ants, and you can tell Irish really wanted those ants gone. He went as far as to lift up all of my flagstones to spray underneath them. He spent a lot of extra time, and he successfully got rid of those ants!
I can't say much more other than that their service is just excellent.
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