My wife and I each have the Topeak TourGuide bag with its integral handlebar quick click mount (Fixer #8 ). It's easily removable. I bought an extra mount for my commuter, as this bag is so good for sundry items. Two smaller inner pockets and one outer pocket. There's also a rain fly, and a shoulder strap. The top plastic window is actually a plastic pouch with a center fold, held on by Velcro. It works well. Highly recommend.