I backed this and have found the more "features" Roost adds or plans to add the less interested I am. I simply want to know if my smoke detector is going off. That is it. They have plans to add about a bazillion different “features” (that I find to be an overreach) which could kill the Roost before it even gets off the ground. Stick to the one simple feature and add as you go. I have received multiple surveys about what I would like to see added and while none of the additional features come to my mind at the moment, none of them seemed necessary or even feasible.
I don’t trust the Nest detector right now, but if it is still around five or so years from now when I need to swap my detectors I may go with it. Until Nest has a much longer track record I won’t go for it.