I can't say I've used them but always been put off partly by the price and partly by some of the b*llocks behind it. It's when they sell waxes for specific cars as if the paintwork is different. Of course different companies use slightly different colours, mixes etc but fundamentally it's just a wax going on lacquer. Lacquer that's not a millions miles away from any other. So why does a BMW driver need a specific wax at £130 a pot?
I know it's all marketing, it happens with everything not just car products and if it makes people happy fair enough but that puts me off. Also, knowing that a £20 tub of Collinite will compete with others twice or three times the price puts things in context.