Our 12 yr old put this together by herself so I think it is fairly straightforward. It isn’t as strong as I had hoped so if u happen to put weight on it for some reason it might not hold very good. I like the gray color and our kitten seems to like all levels. The circular part is pretty small so our kitten barely fits in that part to sit but overall we really like it and so does she)

I’m updating this review- the cylinder part was wobbly from the start and eventually broke off. It lasted approximately from mid august until mid October. Disappointed, but cat still enjoys the rest of it.