Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Worthless

I bought this Blu-ray Tropical Rainforest and it was the worse documentary I have ever seen in my life. The whole video last about 20 minutes, the sound was awful. I returned it to Amazon.com and end up to pay for shipping back and restocking fees since I openned the item. It end up costing me 60-70% and I got a refund of about 30% back of my purchased price. Never buy this product unless you are a NO Brainer or want to waste you $$ like me.