OMG the Arkel bag IS sweet! This thing is stupid easy to get on and off and go from bike to bike with. Already love it! I will see how I can manage the one sided pannier business. This should really save me some time in the mornings. I was getting really tired of moving stuff from pannier to portable bags. It's pretty big, it's grocery bag sized but with all the books, food and stuff I carry I think it's gonna be nice. You can put a 3 ring binder in it sideways to make it sit upright.