Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
Same as you've already read, this blender leaves large food chunks at the bottom of the jar, very rarely truly blending anything.  I called Kitchenaid's tech support, they advised me to start with a slow blend speed, and then progressively move up to the faster speeds.  This works somewhat, but frozen strawberries & bananas never fully blend.  The motor is stronger than cheapo blenders, but much slower.  On the plus side, the exterior cleans well, and I've never experienced the bottom falling out as others have (was the base simply unscrewed from the jar?).  Choose another brand or a cheapo.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: D: negative