I purchased the Shark Navigator Lift-Away PRO today (at Walmart) after seeing it on an infomercial and reading all the great reviews, and I just have to say that it is the BEST vacuum I have ever used!! I live in an apartment and have 3 long-haired cats that shed a LOT! This vacuum EFFORTLESSLY picked up ALL of the cat hair from the carpet!!! I have NEVER had success with a vacuum before like this, and I thought I was going to have to live life in a gross, hairy environment since my cats are constantly shedding. My old vacuum, which was a Eureka cost almost the same amount as this vacuum when I bought it, and from day one it was horrible. It was heavy, ineffective and constantly shot out dust and cat hair from the bottom. Even after vacuuming the same spot over and over again while exerting a lot of effort, the carpet still looked aweful up close. That vacuum was NEVER able to pick up the all the cat hair. This vacuum picked up EVERYTHING immediately and with no effort. No dust or allergens escaped from the vacuum either, even when I picked it up while it was still on! Not only that, but it's very light and maneuverable. I give this vacuum 5 stars. You do NOT need to spend over $500 on a Dyson, because this vacuum will give you the same 5 star performance for less. I highly recommend it, especially for cat/pet owners!!!