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

Input:
I bought this to use as a birth ball. I haven't given birth yet, so I can't attest to how much it helps with that, but I can say that I love sitting on it right now. Being 35 wks pregnant, my back hurts a lot. Sitting on this ball instead of a conventional chair seems to help a lot. I even sit on it at the computer desk sometimes.

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