Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BEST GREENS EVER!

This Barley Max is the BEST quality powdered greens I've ever found. Not gritty like others. Mixes best when shaken up or blended. Doesn't sink to the bottom. If you don't like to eat greens, this is a GREAT way to get their nutrition. We need greens in our diet! Nice rich green color. Raw Reform has always mailed out quickly, too. I highly recommend this product.