Important to me was the writing speed in the first place. Since my Nikon camera because apparently anyway is not the fastest, I had a normal Class 10 (Transcend) really sad values. Once the camera started to write the data to the card, photos were possible at the earliest in 3-4 seconds. This is very annoying when shooting and when it really counts time on it. This Transcend card I hereby wanted to replace. This is also managed. Now the images the camera writes much faster and I wait even if the buffer of the camera is full more than 1 second to the new picture on the card (RAW + JPEG). So this card is noticeably faster. I highly recommend this SD card so highly recommended.