I have a 1 year old male cat who is all boy.  He loves to run and play and will try to climb anything.  He loves his tower and spends a lot of time jumping and climbing.  He loves hiding his toys in the "cave".  He does not however like the hammock.  It swings when touched which makes him nervous.  My  2 older female cats completely ignore the cat tree.  This product was a good purchase... affordable, easy to assemble and my little guy loves it.