Your sprinklers offers powerful capabilities, but I hope you produce a wired ethernet port Rachio.
Until there is that feature I must pass on this, despite my strong desire to get one, unfortunately must pass.
Range and Interference issues are the most obvious.
Setup problems could occur (Wi-Fi adds complexity to connection).
Access to my sprinkler location is easy, would take me about 10 minutes to toss a line to my switch (and cost less than a repeater)
Security is the biggest issue I have and one people should be aware of. Any Wi-Fi device is a door for exploitation, even a sprinkler controller. Criminals use equipment to listen to a device for a few minuets, then spoof the Wi-Fi station into thinking a malicious cracker computer is a sprinkler.
In my house I have an 8 point router for all fixed devices (like cameras, security), with Wi-Fi station on a completely different branch and firewalled for safety.
When the Rachio includes Ethernet, I would like to see a physical switch for the Wifi.
I have seen some devices automatically turn on WiFi after power issues, which is not safe.
Thank you for reading my concern and with.