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

Input:
I purchased the Bushnell Falcon 7x35 due to the positive reviews.  However, the pair I received were defective.  Only one eye piece could be adjusted and the other one was non-adjustable so back they went for a full refund.

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