Yes they do. I do have to use the bell a lot in daily traffic. Over the years I've used countless bells from classical "ring-ring", "ding-dong" or "ping" bells up to the AirZound. The problem was always: Either people don't recognize it (or ignore it) or it is considered aggressive. The situation has changed dramatically with the spurcycle: The sound is not exactly loud, but intensive and longlasting and at the same time a "liked" sound. So people do recognize it, they do react and they do react friendly and positively. That's one of the reasons why I like that thing so much. It is rather a communication device than a warning horn. Where you'd have to "ring-ring" a lot with a classic bell a single "ping" of the spurcycle does the job and it does it from a distance already. So plenty of time to react for pedestrians and positive feedback.
When people see the bell they are curious how it will sound and if they give it a try they reliably say "wow" and love it instantly.
The basically only issue that it does not solve is car drivers - being isolated from the sound of the surrounding world even the spurcycle does not reliably ring their inner bell. But to expect that would probably be overestimation for any bell.