I've taken my strida on buses during rush hour and being able to lock up the wheels and just lean with the "stick on wheels" on the side was a very useful feature for such a weird contraption. I actually looked at the dahons before too and the 20 inch tire bikes are kinda big and they fold into a big jumble of metal that you will have to keep it from falling once you are on the bus. Like the others suggested, I would look into the 16 inch tire versions if I where you. It does make a difference during rush hour traffic. As for the bag, I never carry one cause If it's raining I'm going straight into the subway then bus, my wheels and I are hydrophobic.
