I'd be wary about using this in a professional capacity without assurances of the security of the images stored upstream and better support for SSL (this last p

I'd be wary about using this in a professional capacity without assurances of the security of the images stored upstream and better support for SSL (this last point is more an issue with PXE clients than with the hosts). Really where this comes into its own is for personal builds. In those situations the convenience of not having to download an ISO and burn it / whatever is an arguable reasonable trade for the potential security hole it creates. Where is in business security is more critical and builds are more frequent so the effort of downloading the latest ISO is mitigated by the frequency you may end up using it. This last point is why many corporate networks will have their own internal imaging servers.