Clean, up-scale, practical and interesting. Put one on each end of a wall where you've hung pictures, using the shelves as anchors.  You can turn them long-ways if, and I stress if, you get a couple of small triangle (.5) hangers and put them on the back of the shelves, being sure they are level.  I'd give them a 5 if they could be mirror images of each other, but that's not possible.