Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Supernatural is great.

I enjoy Supernatural so much, and it's the ONLY television program I've ever watched twice.Not only is there enough mystery and suspense throughout (watch out for the season three finale--I kid you not, I had a nightmare about the safety of one of the characters!), but Dean's dry sense of humor and the pop culture references often make me laugh out loud! Not to mention, it has a great soundtrack. I recommend all of the seasons of Supernatural. I hope it lives on to have more seasons than Buffy! Good job and good luck to my Supernatural heroes (on and off camera!!!).