I love this. My dad not so much.
The instructions are hard to decipher, so we accidentally started building this from the bottom up. The way it fits together means you have to follow the instructions very carefully... which is great if you know how to decipher them. It took us two hours (including having to start from scratch).
In other words, start at 1 and work your way through it in sequence. Do not deviate even a little or you'll find yourself in Narnia with an upside down tree that won't fit together.
It's very heavy, but it needs to be so it doesn't wobble. KitKat is small (~3kg) but there's a lot of force behind her leaping and climbing. This thing hasn't shown any sign of straining in the slightest, even when she runs at it from the other side of the house.
I love that it's so snuggly, but the tree sheds fluff like nobody's business. It doesn't really bother me but it does mean hoovering more often.
We sprinkled the tree with catnip to encourage her attention, but it didn't take long at all for KitKat to start leaping all over it. We've had to put her bowl on the base plate because there's no room for it otherwise, and that seems to have helped her get used to the rest of the tree, too. Her favourite part is definitely the house so far, but she scratches at it often and likes jumping and hopping and sort of belly-crawling around the back of the house on her side.
She hasn't used the hammock yet. (Or, well, she flopped around in it a bit while I was writing this because one of her balls was in it and she wanted it back. She seemed to like it, but then she rolled out on the wrong side upside down so I don't think the hammock is her best friend right now - which is a shame because it was one of the main selling points for me. Hopefully she'll get used to it eventually.) She's also not managed to figure out how to get up to the top platform yet.
I love that the cushions and hammock are all removable so they can be washed. I imagine the pad in the house will require washing a lot more often than the rest, though.