Fantastic speed increase from my class 2 card on my HTC HD2. I can run Android from the card with no speed problems. Packet says up to 30Mb/s and it appears to live up to it. With the SDHC adaptor supplied I can use it in my canon 550D for HD 1080p 50fps recording without any glitches unlike some of the class 10 cards I've tried. Well worth the bargain price of 22.89. got 3 of these so far and worth every penny!