Was really impressed by this cat tree, good construction, easy to put together, did take by myself 1.5 hours to build. Put a little cat nip on each level to introduce tree my cutie took to right away. My cat is 20 lbs and lots of room inside house. My only complaint would be the 4th level before cat roof needs more space or height. Pleased with my purchase. My Cutie can birdsquirrel watch at different heights in her new tree.