Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Water Efficiency

This sprinkler is efficient both with water conservation in mind and time spent watering. This sprinkler has little evaporation due to the way it waters. Water sprays in a stream from the ends of the watering wands and not from multiple holes which create a lot of fine spray which can evaporate before the water hits the ground. Turn this sprinkler on at night to maximize water efficiency and sleep while your lawn is watered. Very little set up time and monitoring is required.