I used the Greenwell Water Saver and was very pleased with how it worked. It makes it easier to water in a new planting without water running off. I usually water in once, then after a few moments go back with another soaking, and then again. The Greenwell made it so I could just give a plant a couple gallons of water at once and it would soak in slowly and right where it needed it.
I give it a good review!