Both my groomer and my vet said my dog had flea issues. BUT I didn't think so because she sleeps on my bed at night and I've never been bitten. Both have tried to sell me "flea repellants". My dog lays behind my chair when I'm watching TV in the evenings so I bought this product to find out if there really are fleas in my house. WARNING! Watch how you handle the sticky paper that goes in the bottom of the unit. I didn't and it took me 15 minutes of fighting it to get "unstuck"! Anyway, after setting it up three nights in a row behind my chair where my dog lays, I figured that's where the fleas would be, I came up with "ZERO" fleas. I also bought a flea comb when I bought this product and I haven't found one yet. I'm giving this 5 stars because it proved a point! Even if it didn't catch any fleas.