We use the Rinos. Handlebar mounted so they will stay on and in use. Some of the guys started with them in their pockets because they were too tight to buy a mount. They don't work in your pocket.
They are a nice tool if the weather changes, fog, snow, daylight, etc. but they should not be replacing common sense.
We like the peer-to-peer feature of finding people for lunch, stuck sleds, etc.
If you are out looking for something or boondocking around you can keep track of where you were, or use it to find where you want to go. It is handy to reference terrain ahead of you, or find a lake, road, saddle that you want to ride to. If you use a map, you may not know exactly where you are on the map.
It is kind of fun to watch top ground speed for lake runs or hill climbs.