It's sturdier than most of the ones in its height range but the top most perch still moves with our 11 lb cat on it, everything else holds nice and steady and he still loves to get on the top perch despite its little movement.  It took him about a week to realize that he loved the whole thing or maybe just to accept that it was his, but now he's all over it now, and I love how its big enough for his size, a lot of cat perches at comparable prices are either too wobbly or too small for a full sized cat to enjoy.  Bolts do need to be checked and retightened though especially for the top perch because they become loose over time.  I'd say overall I'm very happy with my purchase