Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Cool product, but mine was broken

The digital display was missing some characters and made reading it almost impossible for my 8 year old. He liked the idea of it so I brought it back to the discovery store only to find they had no more left. I wasn't into paying the shipping to send it back so I exchanged it for another item. Too bad. I think the store should test its products prior to sending them out.