Considering Buying inReach Mini 2 For ATVing - Is it Worth The Money?

I live in BC Canada and do a lot of ATVing on the West Coast. I need to buy an SOS device for when I'm out of cellular range, is the Mini 2 good for this? Does anyone have any experience for ATV use? Is the device OK getting bumped around on a SxS? What other costs are associated with this device? I have a Garmin Montana with backcountry maps for BC and it works great, is there any way you can sync both devices together?