Advertised read speeds are false. Sequencial speeds for me didn't pass 25, however write speeds are basically accurate, about 18.6 MB/s. Write speed is much more important than read speeds when shooting video/pictures, so for me this is still very acceptable. This card is much more than fast enough to shoot full HD video at 64mbps or even higher. Removed one star for false advertising. Even with the actual read speeds being slower, this is still a fantstic deal for a 128 gb card.Will update if the card fails early or I run into any other weird problems. Package says the card has a two year warranty with the company, and provides address information, so as long as the company is honest I feel pretty good about the warranty.