I'm very happy with Cloudflare's workers so far.

You can store stuff in workers KV (sessions, images, complete static sites, etc) even interact with their global cache with an API.

I haven’t used them but I think one of the bigger benefits (for some) is that they’re running (a forked version of) varnish as their caching proxy, and you can provide your own VCL for doing “fancy” stuff.

Depends on who you ask but.. no they are not. But I think they're pretty good from a cost/performance perspective.

from what i've heard Fastly is cheaper