I had never seen one of these before today. They’re great. Way better than reaching for a single pole in a crowded car and wrapping your hand around some stranger’s fingers. And If you have the whole thing to yourself you can hook your arm through it.
Subway rider here. I will always have one arm through my bag handle. People often get stuff stolen on commuter trains in a lot of cities.
People yoink stuff and jump off the train right before the door closes.