Have been using bulwark for 2 years to treat scorpions. They are always responsive and come out to the house every 2 months. For the most part the scorpion problem is under control. What I like most about them is that they always answer the phone and if a callback is needed in between normal service , they come right out for free . Scheduling is always within a few days of your call. Many times the next day. Max P was my tech and did a great job.