I think we may be diverting from my original question here. I personally feel safer with a four point harness.
In some posting above, comparison made between aircraft and motor vehicle, is a little unfair. An aircraft travels at a higher speed, and height of course; a sudden decelaration or even abrupt stopping, ends with serious consequences.
Your average motor vehicle may travel at say 50-100km/h average most of the time, with a lap/diagonal belt quite adequate. However, a faster racing motorvehicle always has a four or five points harness. I wonder why......
So if an aircraft is faster, with a lot less crash protection around its occupants, to my eyes, SHOULD have the minimum of a four points harness. But eh, I am only the pilot here....
