Instruct: Classify Amazon reviews into positive or negative sentiment
Query: osterizer 2 speed

The first time I used the blender, it literally fell apart. The motor fanblade somehow managed to unscrew itself from the motor and a nut, washer, and lockwasher fell out of the bottom of the unit. Oster customer service said that they will send a new unit to me when I give them the manufacturer code off of the prongs on the electric plug. I was impressed with the performance of the unit for the first 30 seconds that I used it. After that- not so much.