I used mine for a week in the frank church. It worked really well, the messages sent out very quickly and never had any issues. I had maps saved on my phone with at map app that did not open with the zoleo app.. It looks like the teamed up with giai maps so that wont be an issue any longer.. I downloaded the app on my wife phone so we could send each other lengthy messages. One thing that i didn't initially like was that if you have your phone on your person and leave your zoleo with your pack it will chime when you get too far.. so be aware of this but it also ensures that you wont set it on a rock and accidentally leave it there.