Question about Gtech AirRam K9

This hoover is magic, I didn't think it worked so well on carpets, nothing left on my shag carpets. The other surfaces floor, hard or tiled kitchen or bathroom with great ease and clean, nothing dragging on the floor and a very effective brush, it picks up everything that drags I have another hoover, it does not work as well and yet I have a Rowenta for dog hair that it is effective as I have hair that drags a everywhere in the in the flat as I have a pet 😉