None of the 6 or 7 watering zones I have are attached to a hose. It is all underground with valves and what not. That you linked to isn't really going to work with most underground sprinkler systems... which I am going to suspect account for more than 1% of the cases. I've used those types on one off watering zones and they do work. But I don't think that covers 99% of the watering people do.

I (and virtually everyone else in my neighborhood) have a multi-zone built-in sprinkler system. A garden hose timer isn't going to help me.

I'm going to guess you don't actually have a sprinkler system.