I have a backpack, panniers, and a messenger bag. I like them all. The messenger bag I wear lower down than most are suggesting, so that my back is cooler (my least favourite thing about the backpack is sweaty back), and it covers perhaps a 3rd the amount of my back that the backpack does. It's comfortable, easy to swing round and get into, but when the stabiliser is done up it stays in place, even worn low. It's ok if you dont like them though.