I've owned this bag as well. It is 25% smaller than the ortleib downtown and sometimes I was struggling to space. It's a great looking bag, possibly too trendy for some. For me and my rack, I found the clips were stubborn to release from the rack. This is one of the reasons I love the QL3 fixings so much. Also be aware that the clips can detatch from the "hub" but you then have to store the attachment in the bag. Many times I didn't have room in the bag so had to leave them on to dig in my back. And the shoulder strap is huge and comfy. Lastly, while the quality is very good, it wasn't stellar. I had to get my wife to sew the canvas on more than one occassion and the inner pockets ripped too after a couple years abuse.