For me the Varia is now a must-have for road biking. It doesn't matter that I rode for the best part of 50 years without one and survived. It's a great product, especially for cycling on rural roads with occasional fast approaching traffic. I'm not normally a big fan of Garmin UI and software implementation, but they really nailed this one. It works perfectly with my Edge 530 and I love the way it indicates approaching vehicles speed and distance both visually and audibly.