Free operation history for a year. Very fast write: I could be seen by comparing with Lexar (also class 10) the time required to "swallow" shooting burst. Very quick to unload with the small USB 3.0 reader Transcend TS-RDF5K (less than 5 euros!). I do not see why pay more for reliability and performance equivalent brands such as Sandisk also made in China. Besides, I bought a second.