This was very easy to assemble. It can be done solo but was much faster/easier with a second person to help hold some parts in awkward steps. My cat is enjoying it and its great for the price. He has not used the scratching post as of yet, so hopefully he begins soon.

One word of caution is that the instructions indicated there were 3 dowel screws needed for the assembly, but only 2 came with the package. I initially panicked as we all know how annoying it is to be missing parts, but the cat tree only needs 2, so perhaps they include 3 as an extra? 

Either way, great product for a good price.