I went out on a limb to purchase this tree not knowing if my 2 cats would use it.  My 1 year old cat loves to scratch the sisal (YAY!!) and climbs almost to the top.  He still isn't comfortable with the highest ledge because it is a little wobbly when he gets that high up.  My older 11 year old cat has gotten to the second highest perch twice, but seems to prefer sleeping on the bottom level.  She has, however, curled up a couple of times in the little house.  All in all, I really like this item and wish we had gotten one sooner.