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

Input:
It is really good if works. However, I bought 3 of these speakers to keep my family in contact while we scatter over a ski resort. In 6 weeks after the purchase microphones failed in two out of three pieces. It was too late to send them back to Amazon, so I spoke to Motorola about the issue, just to learn that they do now honor warranty if this piece was bought from 3rd party reseller.

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