"It worked"

It worked for a GoPro so what more to say except I wonder how they can fit 64 gigs on such a small chip. Amazing.

"Works in gopro hero3 black edition without issue"

Many have complained that the hero3 requires a high quality mSD card. Picked up this one for a great price on Amazon, and have not had any issues with my camera freezing up or not recording as desired. Transfer rates were as advertised. Also loaded it at one point with 30 or so xvid movies for my daughters to watch on an ASUS epad transformer and it worked perfectly. Highly recommend.