My husband uses the Dexcom one and we have found it to be quite glitchy, he did get support from the helpline which was an hour re setting a lot of his phone but it still loses signal regularly even though the sensor is situated on his stomach (as advised) and his phone is in his pocket. All...
My husband has the One and we find it very glitchy. It constantly alerts him that it has lost signal even when he is next to his phone. The alert does not override the volume on his iPhone so when he accidentally switched the volume off he had a massive hypo as had no alerts. I wouldn’t want it...