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:
The main knives in this set are advertised... from the Pro S line, beautiful and excellent quality.
However, nowhere in the product description does it say that the steak knives are not Pro S knives, but in fact serrated much lower quality knives from the Gourmet line.

I had gone back and forth in my mind between buying Henckels or Wusthof knives, and was incredibly impressed with some non-serrated Wusthof knives the other night at a nice steakhouse.  To find out that I had inadvertently bought a set of lower-end serrated knives was a disappointment.  I would have willingly paid more for an all Pro S set of knives, so this is unfortunate.

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