Vinca is essentially a tool that a support provider gives or recommends to a normal user who needs help/desk and cannot deal with x11vnc tips and tricks. After a simple installation, user only has to write his/her supporter address (first time), and the remote listening vncviewer receives remote control connection. Pressetting of address is supported for OEM preinstallers. Dinamic address assignment too.
If connection doesn't succeed, complete diagnostic is reported to the user in plain words. A tool to help on Vinca installation is also available to face worse scenarios. As TeamViewer makes easy to everyone an instant connection, but Vinca uses neutral protocol (VNC) and not requires a MITM company to control the service use.