We used this with my daughters (middle school and elementary) for a school project, and it was night and day difference from previous coding experiences. For a generation that has grown up on Google docs, the experience feels so obvious and natural. We got it hooked up to github very easily as well, so they could get some level of version control without having to do all the incantations that developers all blindly accept. Auto-complete, etc are top notch. And the fact that there's an immediate publishable URL makes the feedback loop feel very fast.
