> If you're only biking on the road I wouldn't get that, only slows you down.
They will make you feel like you are moving slower, but my bicycle computer shows that I move faster. Moreover, wheels follows ground more precisely, which reduces risk of losing contact with ground. I'm crossing road bumps at full speed, while sitting and continuing pedaling.
> Not sure if you're serious...
I'm serious for both recommending to wear helmet for first 10 falls at least (because newbie is like a toddler), and I'm serious that I don't need helmet (because I'm not a toddler anymore).
Bicycle is safer than walking per km traveled. Are you wearing a helmet when walking? It's dangerous!