Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
My initial impression of these was pretty high. I was able to get both eyes in sharp focus on a bright star, collimation seemed also very good and chromatic aberration seemed acceptable. (Note, this was just by bracing myself against a sturdy object; a tripod might have made any subtle flaws more noticeable). The next day I tried to view nearer things in daylight. Again, at first I was pretty impressed. Then as I focused the binoculars in and out, I heard a kind of crackly noise, and eventually noticed an intermittent clinking sound (like metal on glass) as I moved the binoculars around. I traced the sound to the right barrel, and shined a flashlight through the objective. While I couldn't see a loose element, I could see a bunch of clear flakes sitting on the objective and scattered in the right barrel. I don't know if it was lens glue or actual glass, but this is not good. I can't speak to what happened during shipping, but in my possession, it was never roughly handled or dropped. The only "shock" it could have received was thermal shock from going outside in 20F weather to look at stars, which hopefully shouldn't cause an optical train to fall apart!

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