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 bought several Anker power banks for Christmas gifts last year and every unit, except for one, is still up and running. After working great for a little over a year one power bank stopped charging itself. I tried different cables to charge the power bank but nothing worked. Finally, I contacted Anker's customer support and in less than a week they had shipped out a replacement power bank! Love this company and their products!
5