This was so easy to assemble! A little awkward because it doesn’t lay flat, but I had no issues. All it is is screwing the sisal towers into the different carpet hearts (they screw in easily maybe ten-fifteen rotations and at the very end you put 3 screws in with an Allen wrench (it is included). The instructions couldn’t be more clear. Each tower is numbered (there is one 2, three 4s and three 6s. The instructions tell you what sisal tower number and which color heart it screws into. The most simple cat tree I have ever put together. For how cheap this was I am surprised at how sturdy it is! It’s the perfect height! I wish this company would come out with variations because I really want more! It is the cutest cat tree I’ve ever seen!! I’m so excited and both of my cats love it! My black cat never gets up on anything, cat trees or cat shelves and this is her new favorite spot! She hasn’t moved from it since I got it put together. I was worried she couldn’t get down and was stuck, but she’s not. I was a little disheartened by how hard the surfaces seemed to be. There is no padding. It’s just the board and carpet and it seems hard, but my cats don’t seem to mind at all. They’ve actually been on this cat tree more than my other ones. The carpet is soft much softer than floor carpet. This is superb quality and I highly recommend buying this! This is one of my best purchases! Oh and my one cat loves scratching the sisal tubes. I have three vesper cat trees and when she scratches the sisal towers it makes a mess almost like grass it’s gross, but so far I haven’t noticed any debris with this tree when she scratches! Overall I am beyond happy with this cat tree! Oh and the colors are so pretty they’re pastel colors it is so cute