My cat loves being up high on the two top perches of this cat tree; but they're small. She's 10 lb. and hangs over when she lays down. it would be better if they were a couple more inches each way.  It's pretty substantial because of the weight but rocks a little when she's playing at the top. I would have rated this a 5 otherwise. 
I can't get her to use the sisan poles for scratching - anyone got any ideas?