I've had mine for about a month, and on a recent narrative shoot in the deep jungle, log canoes on rivers, etc, it performed like a champ. I got repeated CF card errors with the Delkin that B&H sold me to go with it, but it flawlessly switched to the SD card and googling that night back at base-camp realised that it was a known problem. I've since had no trouble with a Sandisk Extreme CF, and no lockups at any point. This was a big jump for me, technology wise, and I love it.