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

Input:
This product is a good buy.  I will not discuss the physical/chemical properties of silicone grease, but I can only say that if you know about this stuff, you will recognize a great price on a great product!  I am glad I found it!

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