Given the task definition and input, reply with output. In this task, you're given a review from Amazon's food products. 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 or mixed, 4: good, 5: extremely good.

I recently started using Bob's Red Mill Baking Soda. I'm very pleased with it's performance and I can be sure that it is not contaminated with aluminum. Thanks, Bob!
5