I purchased this micro SD card to use in a contour+ camera that I have mounted in my vehicle (I often make interstate drives) and wanted to extend the record time greater than the 32gb cards that I have.  I have not made a long trip with this card at this point, but it tested to be 64GB and has quick speed for video.  I generally get about 8 hours of recording on a 32GB card so on a drive longer than that, I have to change cards.  I expect this card to far exceed record time to cover any driving time I will make in a single day.  It immediately formatted to use in the Contour camera and works great.  I recommend this card if you want a higher speed/higher capacity card.