Very simple to assemble and my kitty slept in the top perch the first day! It is attractive and I am sure he will learn to scratch more as he adapts. 
The brackets that secure it to the wall are very strong and I feel comfortable that it will be secure. I searched for months for just the right cat tree/climbing toy and this one fits the bill. It is tall, secure & pretty. He loves being so high up and the top perch pad is removable for cleaning. 
I think we will both enjoy this. He is sleeping on top right now!