this tree is great, easy enough to put together and the screws go easily into the grooves not like my last cat tree, its also very sturdy and stable, my cats both love it and have been happily lounging around on and in it and my girl was happily battering one of the balls last night so much so that I thought she was stuck but no she was just having a good time, by far the best cat tree I have ever owned, would certainly recommend

edited to add: I wish the sisal rope went all the way to the top of the poles as my cat likes to really stretch out when clawing and she is mostly doing it on the fluffy part which I imagine is not designed to put up with such wear, but that is the only fault I have found