I have used Garmin Montanas 6XXs for years mostly for off-road motorcycle riding (think rough terrain while moving fast) but I do some road riding as well. I find the 6XXs adequate (but not perfect). I recently bought a 700i thinking I was going to be living in GPS heaven. Instead it was a huge disappointment and I’m selling it and recommending that no one purchase the 700 for off-road use (and any use really). I wrote up my gripes here: https://tinyurl.com/bzsem9dk. At the bottom of the writeup I include some proposed UI features regarding map zooming that I’d like to see on ALL Garmin devices. Your mileage may vary.