Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
I had to try this as soon as I got it in the mail. It works great. It fits the bottle, and it does make the wine flavor more rounded. I do not know a lot about wines, but it tastes smoother and easier to drink. I used it for few bottles and it is working fine. Also, washing it was easy and with not problems. Highly recommended. I received this product. I received this product at a discounted price for reviewing purposes.

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