I am very pleased with the wall shelf.  I plan to hang it diagonally which necessitates small pieces of glass in each right angle in order to display objects.  Since I have the tools to cut glass, I can do that easily.  Turned on the diagonal is an additional way to use the shelf and produces a very unexpected design.  

Pros: Options for use
Cons: I easily placed the pieces but was glad my husband had his power screwdriver.  20 screws would have been a chore for me.  Not crazy about the little white stickers to cover the screw heads but do not have an easy solution.