Given the task definition and input, reply with output. 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.

I'm so extremely happy with my new bluetooth headphones! Very happy with the quality and you cannot beat the price! I use mine for listening to music while I exercise, whether I'm at the gym or going on a jog with my dog. Great sound quality and noise cancellation is fantastic as well! I'm happy with the hands free ability to control my music as well...much better than not being able to control my playlist at all. They're also pretty comfy and I didn't have issues with them getting wet while I worked out; nice and dry the whole time. If you're looking for great quality without spending $100, these are definitely worth the $20.
5