What a disappointment for something so expensive. I bought this as my first ever bike GPS, and thought if I invested upfront that it'd be worth it over the many years of future use. Unfortunately as others have said before, the Garmin Edge 800 series is extremely unreliable. Don't expect to track an entire ride unless it's less than 30 miles. When I did my first 200K it froze on me 50 miles in and made this awful beeping sound until I did a force reset and of course I lost my data for that portion of the ride. It also likes to turn off suddenly and you don't realize it or sometimes it'll stop and start tracking you at random times, and this happens ALL THE TIME on rides. Forget using the auto pause function, it doesn't work and eventually my cadence sensor stopped syncing with the device (the cadence sensor works just fine with other GPS's though). This is the farthest from "The next generation of perfection" as possible. Shame on you Garmin, please make a fully functional product before launching it to the public for such a steep price. There were days when I wanted to smash this thing to pieces because of all the data I lost (and I definitely shed a few tears at times), but luckily I came to my senses and remembered Competitive Cyclist's awesome return policy and returned it instead of destroying it. Never again will I buy such an expensive GPS. I think a simple unit might be the best option until Garmin gets their software straightened out. If they do so, this device will be amazing one day.