I bought this model due to the ZERO-M feature. I had seen reviews of this model being used and was impressed. Once I got this model I put it to the test of pet and human hair...I was blown away! 1-2 strands of human hair left after vacuuming, but I am sure they would have not been there if I had vacuumed a bit more. The features of this one are simply AWESOME, I can vacuum my curtains, blinds, furniture now! The extending hose could be a bit longer, but it works all the same. I am now officially a Shark fan!