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

Input:
This was so worth the purchase. We went on vacation to a very cold location and these were a life saver. We put them in each pocket of our coats in the morning before leaving for the day and they stayed warm and at times very hot even hours after opening. At the end of the night they are still warm. This is certainly a must have if you are in a cold climate. Excellent product and would repurchase again if I ever were going to travel to a cold climate again.

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