We have had Biotech for the past three years, and are very pleased with the results. They are easy to schedule online and the technicians are always courteous and on time. We have had to call a couple of times for retreatment--Specifically for small ants in one of the bathrooms – – but with the annual contract they come out at no additional charge, and the follow up visit has always taken care of the problem. I have recommended them to friends and clients!