This cat tree is great! It was easy to put together (screws were marked, but parts were not marked with letters). Looking at the picture, it is easy to figure out which part is which. Coming out of the box, the parts did have an odd smell,  but after a week in an aired-out room it subsided. It feels very sturdy once put together.

My cat loved hiding in the individual parts even before it was all put together. The hanging string is fun for her alone, or for me to play with her.