As the title indicates, it’s fine. It connects to the sauna and operates it. It’s definitely a bit sluggish, especially on initial connection. Once connected though, it’s pretty instantaneous. The app defaults to Celsius, so it takes a sec for everything to switch over to Fahrenheit when you first connect. For me, the chemotherapy colors it cycles through are. It in the correct order for a few of them - ie the app says “yellow” but the light is purple. Not a deal breaker, but the little things like this add up.