I regularly use mine on the bike path when it's light out. It helps make me more visible when the path crosses roads, as well as to the people who want to keep left when walking towards me. Most of the compliments I get about my lights (a Magicshine on the handlebars and a Viz360 on the helmet) are from people on the bike path.

I usually leave the light on blinking for the duration of the ride, every week there's someone who seems to suddenly realize I'm there that I wouldn't expect to have noticed me without it.