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

Input:
This works very well in the indoor pool for water walking/jogging. I feel secure. It is a little bit large for me as I am just under 5'. But  it is adjustable.

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