I had recently a really bad experience with a Deutsche Bahn bike in Munich. I needed a quick ride and I took really the first one. After 100m the bike almost desintegrated and to my luck, I ended up on the sidewalk and not on the adjacent street ( running with cars at full speed - heh, Mittlere Ring! ). Result: Shoulder injury, 3 weeks of spitalization. Nothing to do, since the TOS requires that you check the bike and report it if broken.