I would recommend Official Pest Prevention. I have used their services for over a year. They always schedule their "return-to-spray" times timely (for me, once every three months) without my having to call them and their service people are very courtesy and show up as promised.
Until today, I never say an insect in my home, but today I say a large black bug in my kitchen floor. Unfortunately, he moved to fast for me to catch him. However, I am confident that once notified, Official Pest will return immediately to take care of any potential problems