Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't REALLY clean

I purchased this vacuum a couple years ago because of hype around it. I was somewhat happy with it, but never felt it had the power that they described. Recently I bought a Bissel Healthy Home vacuum to have as a second vacuum, and my wife and I saw this to be a perfect opportunity to test the two. Here is what we found out... We first vacuumed with our Dyson, then with our Bissel. The Dyson did pick up the cat hair, but no dirt or anything. There was just cat hair in the canister. The Bissel pick up about a half inch worth of dirt out of the carpet. So, the Dyson picked up only the stuff sitting on the very top of the carpet, while the Bissel picked up the real dirt.The Dyson is light weight, easy to clean, has a long hose for cleaning stairs, but is not very powerful.The Bissel is very heavy, the hose is not as long as the Dyson, but very powerful and picks up dirt that is deep in your carpet.