Like the others I never had to wait for a GE kiosks at any airport, including JFK (which I've flown into many times - most recently about 6 months ago). As far as scanning finger prints and answering the few questions that only takes a minute or so - effectively negating any "real" time saving you might get using the mobile app and filling out your info prior to landing. As far as I'm concerned it is a non-issue.