We placed these on one wall of our theater room and they work fantastic!  You only need to use one nail per light to hang them up.  It takes seconds to hang them.  They each require 4 AA lights.  These lights are great to use in a media/theater room, if you want lights in the aisles without any cables showing.

Pros: Shade color, easy installation, simple assembly, appearance, size, no wires, good theater lighting
Cons: Battery information missing on product box