The first picture shows Marcus in the condo. I haven't finished building the cat tree yet. This is when I realized this tree is too small for him. But it will fit Sabrina well. 
As far as building the cat tree. It was okay. I built it by myself. (With a little help from Marcus ). Marcus is about 10 lbs one year old. Sabrina is 5 lbs also one yr old. I hope this helps anyone thinking of buying it.