The mirror has made a huge difference for me as my regular gravel bike route on Waiheke Island just off the coast of Auckland, NZ, is on a hilly, narrow no-shoulder road for most of it. It’s not highly trafficked but the vehicles tend to go fast and it’s great being able to see what’s coming up behind me. I feel a lot more confident on the ride. Really good product and think it would be great for city commuters.