5 stars for prompt delivery and customer purchase follow up. I have only opened the package in order to be sure the micro cards fit into the adapter, and that my cameras accepted them; wrote to them; and read them. So far so good. Can't say how they will hold up under extensive read/write, heat, etc when put to a long photo shoot... yet. Also, I really like that 2 cards were included: They could have easily nickel and dimed the consumer by only providing 1 (as so many companies do now).