Not too bad to assemble.  About an hour.  It is tall.  I have 9 foot ceilings and it came close to the top. The covered cylinders are have velcro at the bottom. Not very sturdy.  Additional security at the bottom will be needed.  I have one thin cat and one pleasantly plump cat.  The two of them on it was too unstable and they knew it and therefore did not want to get on it again.  I gave it to my mother and she was very pleased with it for her one 6 pound cat.