My mother used one of these to water or yard when I was a child. Now that I water my own yard I realize that this truly is the best way to water. I can loop it to go around the pool and water areas that are hard to hit with standard sprinklers. You can start it and leave it (just check occasionally that it is still moving).  The water stays low so it isn't watering the leaves of the trees as it goes by.  It gives a good slow soaking.  Some of my favorite childhood memories was running through a sprinkler like this. It's just a great sprinkler!