I use a Carradice Barley for commuting. I really like it but found that I needed to use a Bagman rack for it work. Otherwise it hit the backs of my legs when I pedaled and swayed a lot. One of the nice things about the Carradice bags is that they center the weight so it doesn't affect handling much. I will probably buy another one with larger capacity, either a Pendle or Low-Saddle Longflap, for occasions when I need more space.