I don’t have anything against codepen, I really don’t, but I don’t see how you could say it’s the greatest frontend in the world. I’m actually not even sure what you’re trying to say, to be honest. But whatever it is, I think you’re probably wrong. Codepen is not the greatest anything. It’s a good repository for code snippets, and that’s about it.
frontend web development sandbox is what i meant
it basically eliminates my need for a VM to do the livereload/grunt/compass setup