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:
This is the first heart rate monitor that I have used. So I really have nothing to compare it to. But it works exceptionally well for my purposes. I am traing to run in 2 x 1/2 marathons and 1 marathon. Being able to monitor my fitness has helped me acheive outstanding results. If you are looking for easy use and lightweight this is the one.

Have fun!

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