I am considering a move towards Pair myself. I am away from my girlfriend for the next five months or so and up to now we are only using Facebook messages, and I have growing concerns over privacy (Not that a move to Pair will solve them). But what is pushing me most towards Pair is that sometimes I go to Facebook just to message my girlfriend and it sort of drag me towards answering other messages and notifications and so on. Having an app just for your significant other is a huge plus.