Flex scheduling is a great feature, but will not be for everyone. I was one of many Beta testers for 2.0 and used Flex scheduling on my back yard. Though it worked as I thought it should, ultimately I switched back to Fixed watering once the launch occurred.
The primary reason for me switching back was Flex didn't water enough (a third of Fixed) to dilute my dog's urine, and I was beginning to see brown patches in the lawn. If it wasn't for this occurring, I would probably would be using Flex.
Again, this was a personal choice, and I know that there will be many users that will benefit from the Flex feature. It's worth trying and making the decision for yourself.
Regardless of using Flex or Fixed, I'm still saving lots of water compared to my old Hunter controller. Thanks for a great product and support.