I like this product. I had a tenant that no matter what I did I couldn't get rid of the roaches. When I applied the Gentrol Aerosol and starting treating the cracks and crevices the roaches begin to fade in numbers. It took several treatments ans it indicates on the product label, but by following the instructions I was able to control and now begin to rid the unit of pest. I would certainly recommend this to any landlord that is trying to control cost and maintain a pest free building.
It took a few months but we finally got rid of a drain flies infestation which we have had for about a year. We believe it was the Gentrol that did it, although we've used a variety of products in our jacuzzi tub where the largest number of flies were present.