Shark is going after the Dyson Ball pretty hard with the Navigator product. It claims no loss of suction and claims its just as easy to maneuver as the Dyson Ball. After acknowledging Dyson as the first to offer no loss of suction, they go for the throat. They do a direct comparison to a Dyson Ball and state that they are equal in all ways (easy to maneuver, no loss of suction, 5 year warranty) but price. For less than $200 you can get a Shark Navigator with a free steam cleaner thrown in to boot.
The smart tyrant writes his own story to ensure that it is favorable. The lazy will repeat lines from the book without fact checking.