This thing is amazing!! I had new carpet installed and the next day had a dog guest for a week. This vacuum was delivered the day after she left. OMG I couldn't believe it. Almost a full tank in one room. Now granted, some of it was new carpet fiber but I was amazed. I have used Sharks for years and this one is by far the best. It's a little heavy to push/pull back but that is due to the incredible suction. I will be giving these as gifts at Christmas!