I use this in my Note II. I love it. I have all of my music, photos, and extras on it. This is not my first. I always try and by at least a class 10. I am not doing the test that others are. My pictures seem fast, the transfer speed is within reason. The price was just over $20 with Prime shipping. I would by it again in a heartbeat. In fact, I was probably be buying the 64 soon.