I bought this for my daughter’s two  cats. I have one for my 2 cats that has one less tier than this one (purchased from Wayfare over a year ago).  I love it. My 20# cat has no trouble jumping into the top tier and down again without it tipping  over. Very sturdy.  Both of my cats love to hang out in their tower most  of the day.  I would highly recommend this “cat tower” to all cat owners.