I'm sure it would be a fairly decent product but claims of never wax your car again sounds like marketing bull****. I think Teflon in a wax has no appreciable benefit because it needs to bond to the substraight at very high temperatures. Personally I'd stick to a known brand like Autoglym or Turtlewax.
I had a spray version of that stuff which i used on your car whilst it was dirty. That may explain why spending £9.50 at the jetwash made no difference to your car, the water just repelled off leaving your car still dirty.
Seriously Jim, haven't you spent enough on car cleaning material? you are a marketeers dream.