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

Input:
I tried 6 different brands before trying the Portapro. Without a doubt, the best sounds of them all...just too bad they could not also be noise canceling.

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