Shadow
I've had this card for a couple months now and it is amazing, i use it in my phone so i can put stuff in there rather then use the space on the phone, its extremely responsive and extremely  fast as well, i had a SanDisk class 4 MicroSD card and this flies past that easily, usually when i would try playing music it would take a couple seconds to start, but using this it starts instantaneous , it was as if i had stored the music on the phone itself, i dont know what else you might use this card for, but if you are looking for a MicroSD for your phone, look no further