I have Ortleib panniers. They're fab, waterproof, heavy duty, capacious.
They're completely rubbish for my current commute. I ride 10k, strip lights & wedge pack from the bike, sit on a train for 20 minutes, go to the gym, then go to work.
That means in my pannier I have 2 sets of clothes, a fat-tastic lunch, a pair of trainers and a bag of stuff .
I'm forever emptying my knickers on the train or dropping my jelly at the gym and struggling to find the keys at work. I've tried filling the Ortleib with bags for each purpose but then I have to rummage through bags to get bags.
I want a bag that clips to the rack, is easy to carry over your shoulder, has lots of BIG pockets/compartments, is waterproof. And is cheap.
Any suggestions, apart from carradice, which I rule out as I Just Don't Like Them?