Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mattress is good but the box is amazing

This mattress has definitely improved the pain in my upper back and neck. But it is difficult to sit on it as it sinks it too much. And also very difficult to change positions if you do that while sleeping.But a great bonus for us was the nice big box it was sent in. The box packaging the foam was covered by another huge box. It is quite sturdy and we are now using it as a convenient table for keeping stuff/eating. It is rigid and spacious. In retrospect, this box is coming in more handy than the foam mattress itself so we are very happy. Highly recommended !