At first my cats walked around it.  I tried to put two of them into it; no way!!  Then, when I wasn't looking, my cat was all snuggled up in it, and one of the other cats was picking a fight with him to try to gain access!  I couldn't help but laugh and realize what a good buy I had made!!  It takes time for an animal to trust something, and this is now a "trusted" edition to our household.  Along with the kitty nip, my cats have it made!  Thank you again Wayfair!