I now only buy Sandisk SD cards because they have always performed exceptionally well and just keeps on working. Sandisk data integrity has thus far been perfect and reliabilty excellent. Data speed is as advertised. I had 2 Samsung micro SD cards fail on me out of 6. To be fair, they were purchased on Ebay so they might not be genuine but the pricing and feedback suggests they were. For the same price as Samsung or cheaper, I'm very happy with Sandisk.