I'm building a commercial SaaS product on Workers. Although I've barely scratched the surface of what Cloudflare offers¹, so far it's been great. The value proposition is effectively the same as serverless in general: You worry about the product, they worry about deployment. Note that Cloudflare Workers is just one (albeit important) star in their constellation of capabilities.

¹https://developers.cloudflare.com/directory/?product-group=D...