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

Input:
Terrible. I bought this for a camping trip in the smoky mountains, upon arriving I opened it up, aired it up, it fit perfectly in my 1 person tent. Once I went to bed that night, I laid down on it, and realized this is basically just a pool float. You know, those bright pink/blue/green floats you get every summer for like $1.99 at walmart? That's what this is. It's just a different color. Slept on it one night, then a second night. Come the 3rd night of my trip I laid down on it and realized it was a little flat, Figured it was just the air pressure in the mountains, but no, it wasn't. I aired it back up, went to sleep, woke up in the middle of the night laying on the freezing cold hard ground because this was completely flat. Terrible investment! Go to walmart and buy a pool float. or spend the $8 and get a twin sized mattress.

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