Nope, does not work as documented.
Followed their docs to the letter. Tried VNC (two different versions) and RDP. Looks like a firewall issue and I do not have the time to troubleshoot their offering; will build my own in the time it takes to fix this broken template. Word to you guys; more complete docs are needed. I have been using the VNC server and clients for years, so I know the issue was not on my end.