I also bought a used Delorme inReach off ebay a couple years ago that I pair with my phone as I do solo a fair amount and thought an emergency plan should be inplace. I have mixed reviews on it as sometimes it works great and other times takes 4 or 5 attempts to get a text out. I contacted Garmin customer service asking if the mini has better technology and they said basically no.....it's just smaller and lighter and if my current one works, just keep using it. I really have a hard time believing my 6+ year old device (probably much older) has not been improved upon technology-wise. Phone technology for satellites/GPS has advanced a lot in the last several years so I'm very skeptical on the answers I've gotten on this topic as I think I'd really need to talk to someone with better technical expertise than a regular CS person. I could be wrong but I'd be shocked. So if it were me and I didn't have one, I'd buy the new mini over saving a few bucks. If you really had an emergency, how much extra is it worth if your life depended on it????