A user manual would have been nice, even if it were only a small piece of paper with the information given here. For instance, I was wondering how one would get in with a cane in the door and actually, one realistically wouldn't. One would use the cane to exit the vehicle while steadying oneself on the door.
As for actually using the window breaker if necessary (because of being submerged in water), it's not a pretty thought. However, it is a precautionary thought. This is nice to have.
Vital Link: Amazon