Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
I have had this pressure cooker for 6 months. It worked well for the first three months, albeit with some discoloration as it went through the dishwasher (as others have noted). We used it about 2 times a week.

But then after three months, the lid became very difficult to put on, requiring a considerable amount of force. Sometimes, this prevented the pop-up pressure indicator from rising up, resulting in steam coming out of the indicator. I would get around this by pushing a little piece of metal aside so that it did not obstruct the indicator. With this jerry-rigging, I managed to get the pressure cooker to continue working for another three months. At 6 months, the overpressure plug started letting steam out, preventing steam from building up. At this point, we just decided to get another pressure cooker.

Overall, it does not seem that this pressure is cooker is robust to frequent use and dishwashing.  I hope to find another one that is.

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