I did this because California is facing an impending drought, this may not change in the next few years, and frankly I'm tired of watering my front yard. I want only drought-tolerant plants in my front yard, and fruiting trees and bushes on a drip system.
Also, I happen to live in a city with clay soil, and this will improve it tremendously.
Step 1: Step1: Before
The heir apparent helped me. He's a good waterer.