The 1 bucket method and multiple mitt is great, and does work better than 2BM, But I have too say that the NBM/ Multi Mitt is super fast, same principle as the 1BM but spraying the shampoo directly to the car gives better coverage and adds a little more lubricant to the wash process.
I've been trialling different methods and this has to be my favourite so far.
I use it but I can’t say it does a lot. After I’d ceramic coated the car it makes the crap slide off and a mitt isn’t required . It’s all about how smooth the paint is that the mud etc sticks to .