Nearly two months ago, I reviewed the new SanDisk 64GB class 6 microSDXC (the XC stands for "eXtreme Capacity") card, and came away hugely impressed. Something the size of my pinky fingernail that can store 16 compressed 1080p BluRays, and outperforms my class 10 16GB card? Yes please.
Shortly after the card's release, the company followed up with a UHS-1 (Ultra High Speed-1) class 10 version. While the original class 6 version now rests at $72 - a substantial price drop from the $100 at the time of review - the UHS card costs just $118. At $100 for the C6, it was a questionable purchase from a value perspective; at $118 for the UHS-1, you're paying for a well-deserved premium for performance.