I am a sucker for impulse sprinklers. I grew up in farm country, and it always brings back memories of my youth when I hear the familiar putt-putt-putt of an impulse sprinkler, and see the water arcing out over the grass. The main drawback to them, for me, has always been that they only water in a circle. There were always dry spots where they didn't overlap. Well Gilmour has put an end to that limitation. This sprinkler is absolutely amazing. It can be made to water a rectangle, triangle, or any random shapes that your yard might be made of. It is simple and logical to setup, and holds its settings with no trouble. After using the first one, I bought two more, which allows me to water our entire oddly shaped yard using 3 sprinklers, without wasting water on concrete walks, patios, windows and other things that don't benefit from watering. I would recommend getting the large size, even if it seems like it would be overkill. To achieve the maximum distance range that is specified for either size, you have to eliminate any dispersion, and focus the water into a fairly solid stream. When you do this, the result is VERY uneven water saturation. If you get this larger size of sprinkler, then you can plan to disperse the water, for more even coverage, and still get reasonably good distance range.