Instruct: Classify Amazon reviews into positive or negative sentiment
Query: cheap parts ruin this blender

This blender has great power - which is why I bought it and the price was decent. The base (where the motor is) is nice and solid and metal cased. The glass jar is solid and huge. The part which I have BIG complaints about is the bottom part (which you screw the jar and blades into) This part is made of CHEAP THIN PLASTIC plus it is very very difficult to screw on tightly (to prevent leaks when blending) and even more difficult to unscrew once you finish use and want to clean it.