It's really an amazing experience. For a new user, it takes less than a minute to get started. The first time, as an engineer, I just was shocked that it was actually working so well!
I feel like it unlocks a whole new way to see the city for a lot of people.
The only thing that sucks is the battery only lasts about an hour, so it's not great for tourists who want to go on tour for a long time. Presumably a better battery would be more expensive and people would be more likely to steal it.