Just deployed a 3-pack of these throughout our front/back yard lawns and I must admit they've got it down. I did bury a hose to get one of the units into a central location, but now I'm able to water the entire lawn + nearby tree and flower bed. I will say to make sure you have WiFi that is strong and/or access points that can reach outside. Fortunately 2.4Ghz does well with distance, but that may end up being your only issue with things being located outdoors. Oh, also remember to change the default schedule if you have multiple units on one hose. It defaults to 6AM and (if not changed) you would have all of them running simultaneously.
The concept is awesome, the app is very intuitive, and it just plain works! For my odd-shaped yard, it's an ideal solution.
I received and set up my Single Device. When I tried to program the zone the unit would only trickle water and the iPhone app would crash. After a day of frustration I performed some troubleshooting to see if I could determine the cause. It turned out that my water hose was clogged with a chunk of dirt. After removing the clog I was able to easily program the zone and operate the device. I'm very happy with operation so far. It follows the programed zone perfectly. I would purchase again.
I have had this device since Rev 0 and I started with wow and have continued to awesome! Continuous improvements and great support. What more could you want from a product and company. This device is easy to use and will change lawn and garden maintenance for your home.