I was really hoping that Feliway would help my two female cats get along better. They tolerate each other, but get into spats daily and I was so hoping that this would calm them down a bit. I didn't expect them to cuddle up together, but hoped at least for SOME result. I purchased two of these diffusers - one for my bedroom, where they sleep all night and one for the living room, where they sleep all day. But I didn't see any difference at all, unfortunately. I guess it was worth a shot, but it just didn't work on my cats. :-(