Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DO NOT BUY THIS DIRT DEVIL!

This Dirt Devil has to be the worst designed hand vac in the world. It works great as a vacuum. The brush is [bad].The brush worked for about 5 minutes of vacuuming a couch and then locked up due to dirt and animal hair in the bearings. The second motor is a "vacuum air motor". This means that the suction flow is used to turn a brush impeller which rotates the brush. If you use this on fabric such as a couch, the brush nearly stops as soon as you put pressure on it.I disassmebled this POS to understand better what happened. All dirt/hair must travel through the impeller and then the hair wraps around the bearings/shaft on the impeller. It took me 45 minutes to disassmble and reassemble. I work on robotics for a living and I would not suggest doing this to anyone. This design gets an "F".Into the landfill it goes...Blake Walker