This product was easy to install and program.  I was replacing an older model Rainbird and had no experience with sprinklers systems.  I only have 5 zones so plenty of room to add on in the future if need be.  Very straight forward buttons and programming options.  I also purchased a rain sensor separately and it was also easy wire it in.  So far so good, I wake up on the days I have it programmed for and see that it did it's job just as I programmed it.