Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Quiet, effective, heavy

I was looking for a vacuum that was on the quiet side and am very satisfied on that point. It also does an amazingly good job of cleaning. It is hard to maneuver though. I knocked the power roller off so many times that I ended up tossing it in the closet. Other than that, the onboard tools are very handy. One criticism of the brushes is they way they are angled, you can't effectively clean under sofas and chairs because you can't get the brush to go flat against the floor. I'm in my early 50's and can lug it upstairs so far, but I may invest in different vacuum for upstairs. It was hard to push on my carpets, but I adjusted the carpet height knob and that helped. I am amazed and somewhat grossed out by the amount of dog hair I collect in the cannister every week. If this thing used bags, I'd have to change the bag every time I vacuum. I highly recommend this for a single story house, but not for a two story.