My 12 pound tabby cat loves this.  I placed it beside my computer desk and instead of trying to sit on the computer he is satisfied to sit on the cat tree to be close.  I don't thing I would use it for a cat too much larger than mine but for us it's perfect.  He climbs all over it and through the openings with no problem although it is a bit wobbly.  It really needs a larger platform under it but all in all, I think it was worth every penny.