We are a new customer in March 2017. Every year we have been plagued with the tiny black ants starting each Spring and had fought relentlessly on our own attempting to control them. This year we called Whitworth following recommendation from a neighbor. We opted for the initial full house treatment and the maintenance service every 2 months. So far it looks like we are finally winning the battle. The Whitworth Service Technician has been very thorough. Just had the first maintenance spray today. We are happy and plan to be long term customers.