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.

We've been using it for > than 2 yrs and have been very satisfied. I'm disappointed that the 10# bag is no longer available. The 25# bag is too large and will go stale before we can use it all
4