Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
I like the ease of use BUT for the fact that I have to use a flashlight to see how much water I've poured into the reservoir. That part really needs to be fixed in future models.

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