Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Good product, horrible result

The puzzle itself is great - great pictures and colors and fun and enjoyable to complete... IF I could complete it!! There are TWO pieces missing! I called the vendor selling these on amazon, who said they couldn't do anything and I should contact amazon. I contacted amazon, who said the only thing they could do is give me a refund... if I break up the entire puzzle and send it back to them first. They would not send me the missing pieces nor would they send me a new puzzle so I could pull out the missing two pieces. Frustrating!!