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

Input:
Popcorn is best with about 1tbsp of oil before popping.  A 2 rating is because the "Power Cup Concentrator" (paper tray at bottom of bowl) gets too hot and turns black/brittle after 1-2 uses.  The burnt paper sometimes causes a "burnt taste" to the popcorn.

Even when we remove from the microwave before popping is complete (leaving many unpopped kernels), the paper tray disintegrates.  Replacements are expensive.  You can get by without using the paper tray if you use a bit more oil.

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