Presumably Mr.Dyson has never heard from his customers about problems with their mains leads?
I say this because the latest Dyson TV adverts state that, "The Dyson NEVER loses its suction".
Well I wonder if he ever realised that his cleaners need to be powered from the mains supply in order to develop suction?
I reckon that ALL Dyson cleaners, unless really big modifications have been made to the strain relief arrangements at the ends of the mains lead since I last saw one, will lose their suction. After some lead waggling, as occurs when the cleaner is used normally, the mains lead conductors fracture just where the cable goes into the machine. Getting to the connections is really quite difficult as one needs either a special tool or a specially shaped piece of thin metal to get the plastic bits apart.
Once the cable has been re-fitted and the cleaner is back in business, only a relatively short while later, the cleaner will again lose suction. This time it will be broken conductors at the moulded-on mains plug.
How does one tell where the break is?