They treated my house for termites when I was i the process of buying it so I thought it would be best to continue with them to ensure bugs stay away. I had them spray the house and treat for ants. Apparently the ant treatment has a 21 day guarantee which means they will treat a second time (after 7 days, but before 21), but if the problem is still there after the 21 days - too bad so sad. They are trying to force people into their monthly service to guarantee a customer base vs killing the bugs the 1st time. They're respraying tomorrow, I will update after 7 days to see if it takes care of the problem.