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: Thought I lost the first one I bought, but found it after I bought a replacement. No matter. I'm glad to have two in case anything happens to it. High quality construction. Ball bearing action is very smooth. Under priced for the quality.
A:
5