Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
Used this as part of PT for my knee injury. Once my sessions were through decide to buy one to use on my own. Great purchase.

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