Extremely easy to assemble.  I bought 3, and as soon as the first one was assembled, 4 of my kitties were all over it.  Very sturdy and the faux fur is much nicer than pictured.  It matches the color of the sisal perfectly, so basically the tree looks all one color, which is nice.  Can't believe the price on this.  I run a feral cat rescue & wanted to purchase enough trees to make everyone happy, but would NEVER had been able to do so with the expensive ones.  Will definitely be ordering more soon.