+2 for UniFi. I have one inside and one outside.. The "mesh" is seamless. They can be a bit tricky to get set up... mainly because of the special app, and then not using Safari for the rest.. but I've been happy with mine and have installed them for others as well. I have 2 UniFi AP=AC-Pro... .work very well.
Don't know how they may integrate with Indigo.... but I can easily understand they desire to automate them...