Pros: Collects much rain water, doesn't overflow rain barrel, no misquitoes
I bought a RainReserve water conservation product and love it. It attaches to your downspout and to multiple rain barrels collecting rain that falls on your roof, while allowing debris and overflow to pass back out the downspout instead of the rain barrels. The product is also made out of a recycled corn based polymer. The kits come with everything you need to install it to your downspout and rain barrels. It is useful for watering your garden, and washing your car and pets.