Instruction: Determine the sentiment expressed by the user in her review from the provided choices, and respond by selecting one of the available options.

Input:
I decided to order a better yoga mat once I committed to my practice more. I was skeptical about spending so much on a mat but it seriously made a huge difference. I was like going from a Geo Metro to a Lexus. I feel far more sturdy on this mat. It is a bit slippery at first but once you break it in, it's fine. I also really appreciate the length. I'm 5'8" and found the standard length of mats too short. I noticed a smell the first time I used it but none after that. It's lighter than the PRO, which I prefer. I'm also a fan of the eco friendly production.

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