They're a firm favourite with me too. Wouldn't wear anything else.
I'm about to give them a real test though cos I've just got back to running after having DD2 and my bf-ing norks have expanded to an E cup. I've got a new bra on the way to accommodate them, but my old one, which is a couple of sizes too small, is still doing a sterling job in the meantime, even though I'm asking the impossible of the poor thing!!