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

Input:
I took this camping and it made a world of difference. It's longer than the sleeping bag, but not quite as wide. I had to reposition myself often, but I still wouldn't camp without it. It rolls up very nicely, too.

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