Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very disappointed

At first we were very happy: the suction on the vac is very strong, the roller also very effective, and the hepa filtration seemed to be working perfectly. Within a week or two the wheels on the powernozzle began to squeak. And now, just a little under two months(!) after we bought it, the roller brush is not working at all. Because the design of the roller is to have plastic end pins inserted in and spinning in a plastic holder, they wear, get hot and melt. What a teribble design. Maybe the better metal roller on the more expensive Eurekas work better, but this one seems to be fatally flawed. Not recommended except, perhaps, if you have little or no rugs and carpet to do. But why pay for such an expensive powernozzle then?