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

Input:
This is by far the best headphone I have used. Base is a little bit lean but ok for me. Mid and Treble are wonderful. I probably will stop buying new headphone for a while.

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