I never thought that my dog would come down with a case of fleas since my dog always gets a treatment of Frontline for flea and tick control but after a weeklong visit to a doggie camp while I was on vacation he returned home with extra friends in the form of fleas. After a distressed call to my vet she recommended the usual remedies as well as purchasing several of these traps. I had no idea such a thing even existed until they were recommended to me but I am so glad they do. I ordered several online and as soon as they arrived I placed one each in the bedroom, kitchen, and family room. By the time I woke up the next morning the sticky portion of the trap was speckled with fleas. It was a bit disturbing to discover that there were actually that many in my home but I was happy that it was working. Over the next week or so I noticed the surface becoming darker and darker and I changed out the disks at the end of the second week. The refills are extremely inexpensive at about $5 for three so it's definitely worth it. Overall, while the initial price (about $15 a trap) can be a bit expensive the refills are inexpensive and it is worth it for the piece of mind the product provides. It is non toxic and safe around kids and pets and is completely scent free which makes it a complete win in my book. I certainly highly recommend this!