When I took the pieces out of the box and started constructing the house, it didn't take long for my cats to start exploring it. They didn't even wait for me to finish building it.

I've now had this product for a while, and despite the opinion that it would go unused after a while, my cats still enjoy their tree. They've been a bit rough on it and some of the posts are a bit loose now, and will need to be tightened, but they pay no mind to that. The slide looking attachment didn't stay attached, but they still use it as well. 

When first purchased my two kittens could share the bed on top with room to spare. One of them still loves that top perch, though he doesn't fit quite as well as he once did. (He's about 12 pounds now.) 

Each of the three cats spend time lazing about on the various perches, sometimes just hiding out at the bottom. And the two younger ones (with claws) really enjoy the sisal rope posts.