I have - and it's probably my preferred of all the sandboxes I've tried out. But when it comes with this disclaimer about being Alpha and not to use in production, it makes it seem like you don't think it's ready yet :)

Btw - any plans for a web app to manage network approvals etc.? It feels so archiac monitoring in the console (honestly, I don't know what the obsession is with terminal UIs lately... Yes it's great that they work via SSH, but if I can SSH to a box I can also probably connect a browser to it )