Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: worked 'once'

I was very pleased the first time I used it with an SD card, but the second time I tried to insert my CF card and it would not go in...then I saw that one of the contacts in the middle was bent. So now, the whole reason I bought the device is not possible. I am NOT a novice and as a professional photographer I am very careful when inserting CF cards. What now?