The company I purchased the Rachio 3 from sent me a replacement. It took me less than 15 minutes after plugging it in to get it set up. So it was a bad unit. I wish there would have been something somewhere that described if you have a blinking 1st quadrant that has an intermittent red, then there is something wrong with the units wifi reception. I spent well over 6 hours trying to troubleshoot the unit and felt there should have been a quicker way to find the problem. I have the tools to check the signal even though the router was less than 20ft away and was still told by tech support to run through all the troubleshoot tips I found here and elsewhere on the web and had already performed.
Now that it is up and running I can see why people like this device. I wish they would spend a little more time on quality checks and customer support. Email support only with a 24-48 hour promise of response is a bit antequated for such a high tech device/company although I did get a response with in a few hours. All that said, so far I like the ease of use and the capabilities of the Rachio 3 but I have only had it up and running a couple of hours.