I was worried about it being wobbly because its so tall (83 inches!) but it comes with a wall strap. we didnt even use it because the base is heavy enough. the two caves are actually spacious enough for my maine coon mix which is a miracle. usually he can only fit his head in those things. my only gripe is the box it came in was super heavy so i had to drag it across the floor. worth it for the 9 scratching posts alone since my sofa is finally being left alone!! colors great.