use the card in a Sony a77 because the buffer rel. is small, I need a good typing speed, and as I often bracketing (RAW + JPEG), which are then each trigger about 100MB, and that needs to quickly get out of the buffer. the speed is compared with the SanDisk Ultra with 30MB / s (where as the Write speed. only to the 10MB / s) palpable. if the controller now also robust (to be seen - had a Transcend UHS-I 16GB because the controller has need after the first time adopted = card is electronic waste) seems this card to offer a top value for money.