Two major concerns regarding Ronnow Lawn Sprinkler Inc:
1) The technician arrived an hour after his scheduled window. He was supposed to show up between 11am and 1pm and arrived at 2pm. I finally had to call at 1pm to find out if he was still coming.
2) The Ronnow technician was quick to ascertain I needed an entirely new control panel for my sprinkler system. I was on lunch break, didn't have a lot of time, and agreed because the panel was old and my grass was dying. The total repair cost was $340 for the panel and 15 minutes of his time to repair it.
Once I had time to research it, I discovered the average cost of a standard control panel is $75. The technician installed a "commercial grade" panel for my shrubs ($200) Completely unnecessary.
If you decide to use this company, take a moment to price-check the parts and be clear on the cost of labor.
My brother is a master mechanic in CA. He advised me I shouldn't have paid more than $150 TOTAL for this repair. Good luck and try another company.