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

Input:
The lid design is clever, doubling as a skillet that can be used separately or in tandem with the pot, and the craftsmanship is adequate.  The pot craftsmanship, however, is terrible.  I almost returned the product after I realized that the interior of the pot was so abrasive  that it was snagging fibers off the cloth that I was using to try to wipe it clean when I first got it.  I may still wish that I had returned it.  I found that the craftsmanship and quality control on the pot part were terrible.  I invested money,  time, and effort trying to grind and polish down the interior surface to make it acceptable for use.  As I worked on it, I found that not only was the pot interior rough and abrasive enough to tear apart cloths and sponges, it pitted and uneven on the bottom, and had lines where molten metal had run down the side  due to  poor casting control.  The quality control on the cast is so poor I am genuinely concerned about the quality of the metal and the durability of the pot. After all my extra investment in it, I have a reasonably useful, if worrisome, product, but not one that I would have bought if I had known what I was getting.

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