This is a well-designed, very useful shower caddy.  There's a place for everything and it fit perfectly in the shower on a small, triangular, built-in shelf.  It would work fine sitting on the floor of a shower, too, as long as you are not trying to use it in a tub shower with any curvature on the corners. If the corner ledges of your tub are big enough to support the base., it would work well.  

Pros: Utility, nice design
Cons: Can't use in a tub shower unless corner shelves in the tub are big enough.