I have used the SHARK APEX 5 times with different attachments, I was arguing about the rating. I've used a 20+ pound Kirby and a Dyson in the past. What makes this Shark Apex different is that it's so heavy, but the weight isn't in the head/on the ground, the weight is on the stick controlled with one hand. On the mat with the mat on, it practically pulls itself forward, which is easy, but the effort is invested in all the turns, curves, obstacles and nooks and crannies. Moving this thing to…