Quick and painless this review. Quality assurance seems meantime at Sandisk probably be a foreign word. I've never had problems with Sandiskkarten years ago. The latest is no longer true. Two cards (a 16 GB and a 32GB Ultra with 50MB / s) was a partial defect that had bad sectors. The second (32GB) was completely broken. She was even recognized neither by the camera to the card reader. More can not write to it. As a photographer, you should probably have more than reason to doubt the reliability of Sandiskarten. There are smooth ZERO star. The one star Amazon can adhere to good service.