Im interested in this thread as well. Last year I tested Garmin 5x for a few weeks and found its elevation to always be up to 200 ft off. Garmin inReach is usually within 30 ft but a pain to take out every time. Now I use the Garmin Foretrex as it’s usually within 10-20 feet off at most. The Foretrex is the best option I found for trips multi day trips because it’s breadcrumbs are extremely accurate. At 1 min intervals the batteries last about a week. Plus, it’s two aaa so easy to replace vs having to charge. Every other option with accurate breadcrumbs burns the battery within a day so this is my go to for expeditions. It got me out of whiteouts on glaciers twice already.
However, it’s extremely limited for training purposes. Basically useless. So I’m looking for a good training watch with accurate elevation. I was debating between Suunto or the new Coros? Not going back to Garmin as I already know it’s not great with accuracy. Seems Suunto has better accuracy but Coros has a lot of bells and whistles?