Detailed Instructions: In this task, you're given a review from Amazon. Your task is to generate a rating for the product on a scale of 1-5 based on the review. The rating means 1: extremely poor, 2: poor, 3: neutral, 4: good, 5: extremely good.
Q: The product is excellent, it was the only thing that finally helped me in pain. I'm glad I found it before the final possibility of surgery. Remains cold for a long time and much more reliable and has a higher quality than any similar product I have tried in the past. Also the service was excellent and it came on time.
A:
5