I actually noticed dead fleas using this product on my kitties vs the leading brands so I came back after trying others. Not only is this way way way more affordable it's safe to use and does provide relief and it shows. Also u can use it weekly if u have a bigger buggy issue lol I'm so happy I came back to them. Now I know my kitties r getting the help they need because I can actually see the results. Also not to mention they have the BEST customer service. They've helped me many times and even offered me free product to try and see if I like it better than the other which was one that I didn't rly need since my kitties r all indoors. Lila is the name of the sweetheart that's been helping myself and my kitties and she's amazing at her job!!! Wish more people were like her when dealing w customer service.