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:
Our in-laws and parents had electric knives that still work after 50 years. This knife stopped working after about 2.5 years. We used it daily to cut bread. The push button switch began to stop working intermittently.  Now it's hit and miss and very frustrating to try to use. I will try to repair it myself, but I would not buy this knife again, especially given the relatively high price.

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