A key selling point and benefit for me too on the Mezzo is the purpose-designed rack bags and the convenience at which they slot on and off the rack. They're expensive, but extremely well made and I can't see them ever wearing out or needing replacing so the cost is not really an issue.. The commuter bag doubles as a brief-case, shopping bag or overnight bag.. clearly a lot of work has gone into the design of the bags...the commuter bag has removable reinforced padded walls with thick plastic sheets in the middle to protect a laptop etc.