I used this once to debug live with coworkers. Now I use it 100% of the time for local builds. Super useful when doing front end work and you want hot reloading across multiple clients & you don’t want to lose things like Cloudflare Workers or Page Rule effects.
Cloudflare for Teams makes it even more powerful where you create a tunnel to a local build & then restrict traffic on the subdomain to a specific G Suite group in your org (ie QA or Developement).