Summary: I own several Garmin GPS devices, including two Nuvi, a Garmin Edge 705 and a Garmin Forerunner 410. So I was happy to purchase the new Edge 800 GPS computer for my mountain bike. After 3 rides I can definitely state that this GPS was NOT designed for a mountain bike. While it is waterproof, this GPS suffers from an extremely soft plastic touch screen which got completely scratched after 3 rides.
Summary: I'm a true Garmin Cycle Computer follower. ( I owned the 205, 305, 705 and now the 800). Sure it is cool to have a Touch Screen and it really works. But the Dispplay is horrible. It is about 25% bigger than the one from the EDGE 705. However the 800 has basically the same resolution (160 x 240 pixels/800 vs 176 x 220 pixels/705). This makes the screen really blurry and the contrast is terrible. In order to ride in daylight you need the backlight on all the times.
Summary: As the owner of a 705 I figured the 800 would be a big step up- touch screen, next generation hardware, etc. Wrong, as far as I can tell there' absolutely no new functionality, the battery does not last any longer, the screen is a bit bigger but no better quality in bright light, the bike mount has not improved, etc.
Excerpt: Having used 2 excellent Garmin Nuvi devices for many years without complaint I am somewhat disappointed with the Edge 800. For a "top end" device costing a significant amount, frankly I expected better of Garmin. The user interface is not "intuitive". I consider myself to be fairly '"technology literate" owning the obligatory Blackberry, Ipad, Sat Nav etc, but I struggle with the Edge 800.
Pros: the style and construction of the unit is first class.
Cons: Poor guidance when on route. Clunky and unintuative interface