MY HUSBAND LOVES THIS TRAVELLING SPRINKLER.  It is well-made, easy to set up and a lot of fun to watch... Too bad it has been raining here in the Rocky Mountains so much this month... we haven't needed it.  The only thing better than using this sprinkler I suppose is not needing to water your lawn ever!  We use it on a 15 foot by 50 foot area..... we have experimented with both speeds.  Almost mesmerizing to watch.