Excerpt: Garmin’s Edge 500 is a new bike-specific GPS unit designed for training and racing. Cyclists generally train on roads they know. Since race routes are clearly marked, map functions add unnecessary bulk and expense for a lot of users, so the wireless Edge 500 does away with them.
Pros: No waste — every data field is specific to cycling. Crazy lightweight. Seamless integration with desktop and online utilities.
Cons: A more secure mount would be nice. Awkward button placement.