There really isn't much to say about this card other than it's been very reliable and handles HD video from my GoPro Hero 3 very well and without a glitch.I'm not offering any benchmarks or other measurements of speed in comparison to other Class 10 MicroSD cards. All I can tell you is that this card has yet to fail me and I am a longtime video professional who works in a commercial/advertising/marketing environment, so I need things to be reliable for all of my clients.Recording and transferring video from device to computer is a snap and I've had no issues with it since I began using it.