Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: This is a good product, however, we have now had two pairs that stop working soon after using them. The first pair lasted a couple of months and the second replacement pair last only two weeks. I purchased these as a Christmas gift for my son to use while running on the treadmill and working out at the gym. I am disappointed in these especially since the replacement pair only lasted two weeks. The company will replace them, however, if the product is defective than it doesn't matter. I am out the money and my son doesn't have any thing to use while working out. I will have to research and see what I can replace them with. I would not recommend this product.

Replacement pair stopped working after only 2 weeks.