Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Adaptors didn't work at all

I bought these to use in my digital camera, an SD device that supports MicroSDHC with SD Adaptors. And these MicroSDHC cards worked fine -- once I tested them in a friend's adaptor. But the adaptors that came with this didn't work at all, which made the whole product useless to me. I contacted the seller (Digital Media Source) for a refund, and never heard back.