That's funny because I question anyone using a phone to do this with. I instinctively roll my eyes when I see some poser SUV with a big tablet or phone mounted to the dash with no real GPS. No phone or application will ever come close to what a real GPS can do. Not to mention having a mounted device is SO much easier and reliable to use in every way. I was just with a friend who thinks this way and he uses his new iPhone for all GPS needs and I swear he cusses at the top of his lungs an average of once every few hours as he gets lost, it drops out, screws up in some new, amazing way, etc.. Meanwhile I have a ton of features, maps, topo's, tons of other navigation info, 12v powered or battery, waterproof, etc etc, etc.. instead of worrying about a phone cable, having to take it with me and change screens, etc etc etc.
Get a GPS and you will quickly see how stupid the phone thing really is.
Anyway, I'm all for them trying to compete but nothing comes close to the Montana 650T or 680 overall.