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

Input:
Bought several months ago, finally went tent camping in May 2015, bed deflated over about two hours.  Fully inflated early in the day, paced sleeping bags on it to give it the day to stretch out, re-inflated to account for stretching and attempted to sleep on it, was flat within a couple hours.  DON"T BUY A $15 AIR BED!

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