SanDisk has never failed me. I've held MicroSD cards by SanDisk in all sizes in the past and they've all been brilliant. But the speed difference in this 'SanDisk Mobile Ultra' card is noticeable. It works like a dream in my HTC. I'd recommend this to anyone who needs that extra space and performance to store and playback music or videos. I'm glad that I found it.
The best MicroSD card I've ever had. Buy it.