It was not that hard to put together.  My cats like the platform in the middle better without the tunnels - they are way too small for may cats - they would be ok for a kitten but a normal cat too small. The screws that hold the top ladders on keep coming loose.  The tree would be better if all posts were covered in the rope and not the fabric.  My cats took the fabric off pretty quick.  The little hammock beds are one of my cats favorite parts to lay in.