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

Input:
I bought this more on a whim than a perceived need but after using I am a firm believer of the added assistance and improved flexibility I have attained since i started to use it.

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