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:
I love using it. It takes about 20 minutes to cook those food that we used to spend 2 hours cooking in the normal way. Of course it takes add' time to heat up and cool down, but it's really efficient and easy to use. I only regret that I did not own it until now.

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