Excellent collector of rain water!!  We have 6, we grow all our herbs in the top (basil, oregano, thyme, sage, chives, parsley, cilantro, etc...)which makes watering a breeze out of the top spout, no dragging the hose around.  hooked up the bottom spout to a soaker hose that takes care of my roses.  90 gallons of water has lasted us in between rains here in California.
Con:  faucet turns be gentle with, they can break pretty easily.