I bought this to spray my yard for mosquitos. In Texas, it is hot and humid in the summer and a lot of days we don't have much of a breeze. I take care of feral cats and they would lay in my yard and they would have a halo around their whole bodies with an abundance on the face and head of mosquitos. With wondercide, it worked immediately and I followed their directions and it has worked 100% for me and my kitties. I was not paid or compensated for my review. I don't usually leave reviews but when I came to look for an indoor product, I saw the reviews were not as high as they should be. I didn't want someone to miss out on a great product because they saw the lower rating and moved on. I could be wrong, but it looked like several of the bad reviews were the same person. My ferals do not appear to have fleas either. The ones that will allow me to handle them, definitely don't have any fleas.