I know that both Mm and Animas are supposed to be waterproof unless they have a crack in it. But I wonder if Animas is made to crack less frequently so thay can call it waterproof whereas mm will crack easily so they won't label it waterproof. Does anybody really just go swimming with their mm as if it is waterproof? Is this a terrible idea? I know mm will replace it even if it got wet so I'm wondering if we should just risk it and go in the pool with the pump.