I received the box and didn't open it bc i thought it was like other trees I had purchased in the past and didn't feel up to spending 40 mins assembling it lol. Finally my 11 yr old granddaughter and I pulled the box out after 3 days opened it and Laughed bc it was partially assembled Already!! We kept saying we should have opened it right away! only had to screw in 2 beds and 1 pole took  Less than 5 MINUTES! the quality is AMAZING and my Big Fur Babies 22 lbs and bigger all were on it in a matter of seconds! Very Sturdy and handles the 100 lb cat weight easily! I will be purchasing another one