I am using Flex Daily for my lawns (4 zones.) Recently the City website said I could water Mon, Wed, and Fri. so I decided to try Flex Daily. (I was using a fixed schedule.) The result is that the individual watering times have increased over what I had used with the Fixed, but the frequency went down. For august the lawns were watering about once a week.
Over all the new schedule is using less water. (This just proves that dictated water saving rules can be counter productive.) The longest "gap" would be 2 days--Saturday and Sunday, so I am not too concerned for the July climate. I think that the worst that might happen is that Flex decides it has to water each day that is not restricted. Then it would essentially become a fixed schedule. I expect even longer intervals this winter.