Love this wall shelving! The design of the shelving visually provides a distinct outline on the wall on which I have displayed various small art pieces on it. In fact the piece was so dominant I decided to order two of the "S" shelves to hang on the left and right side of it to provide a "visual" balance.  
Reason for a "4" star rating is when I received this unit it was missing a plastic anchor so I had to go to the hardware store and buy a single anchor, cut it to size and hammer it in place. I also painted all the silver exposed connectors with black acrylic paint. Can't even see them now.  Library wall looks quite "classy" now. 
Side note:NO ONE locally or on line who offers shelving similar to this had the A) The "look" or "price"!!!