I've been holding off getting a Virb until I knew the app with the Montana was functional (like more than the iOS app before Xmas). If anyone is using this, I would greatly appreciate hearing of your experiences.
I've used the Remote app on both the Montana and 78S. Works exactly as expected.
Just so you know, all it is is a Remote app. Not the "VIRB app" as seen on iPhones and Androids. All you get is a video start/stop and shutter release for pictures.