I highly recommend Holistic Pests Solutions. I tried to hire another company first to spray for wasps which were circling my house. I saw the wasps flying around looking for a place to nest. I wanted to prevent them from doing so. That first company declared that they can only spray existing nests and they can do nothing unless they find a nest, just wanted to collect $99 for inspection. In contrast, Holistic Pest Solutions understood the problem and their technician was able to spray my house preventatively. He explained that the product they use will discourage wasps from setting nests there. And indeed, within a day or two there were no more wasps.
Next time I contacted them because I found some ants entering my kitchen. I was leaving for a trip and wanted something done before I leave. Within one day I got a scheduling call from the technician and a day later he came and treated my kitchen. One cannot ask for a better service. Thanks!