I use this Chrome Berlin Bag daily. It has an extra strap that keeps it from shifting on my back. It is confortable and allows easy access by easily sliding to the front when I want to open the flap. The seatbelt type buckle allows an easy and fast buckling up. The bag holds as much stuff I need/want to carry including some quick groceries, 6 pack of beer, work related stuff, etc. Great bag, guaranteed for life. Durable, waterproof. It actually massages my lower back when I ride.