Too me this seems a more pricey lazy way of cleaning haha?!? I'm gona stick too the hand washing + a jet wash me thinks, maybe when the new job comes about I may dip in the pocket and try this foam method 
Its a crucial stage in the washing process.....
Jet washing will not remove half as much of the crud as the foam lance will. And if you use one of those horrible garage jet washes all you'll be doing is stripping the paintwork of any wax you might have applied
1. Never gave a car much tlc in regards too cleaning before.
2. I will next week attempt my first propper wash. As I have gone an spend quite abit on the bits and bobs needed, I normally use my mate next door's jet wash. Or the hose lol.
3. Gona be washing it with the mit anyway

will have a good look over polishing methods etc over the next few days, as not sure if you can just use microfible cloths too polish with?