In the US, Dyson is being sued by Euro-Pro for false claims in their marketing, as can be seen in this article.
Dyson is advertizing a claim that it is having twice the suction power of any competitor. But independent testing shows that it is slightly lower, or equal. Not higher, and definately not twice as high..
Their claim is false, but they have refused to remove it. Lying to consumers? Why?
And now they are being taken to court.
It will be interesting to see the outcome, and how much this will cost Dyson.
A totally false advertizing?: