Plain and simple, these guys are good! Mark Dern is a true professional and is also very friendly and courteous. Since you're paying for time and material, it's refreshing that he worked as quickly and efficiently as possible. All the while, taking the time to explain what and why he was doing what he was doing. He even let me help a little and I actually did contribute and save some time overall! Mark even reprogrammed my timer and system control unit. All-in-all, a very pleasant experience. I will definitely be using them in the future! Thanks, Sprinkler Doctors!!