I've used a Garmin Edge Touring for the last two years. It is pretty good, but tends to take me on back roads when a two lane highway with great shoulders would be faster, safer, and less hilly. Battery life is not great for touring. In my experience it is good for about 4-6 hours, but I have a solar charger with a battery pack, and could go for weeks. I wouldn't rely on the unit's internal battery on a tour, unless I had backup paper maps or cue sheets.