Interestingly, the two higher speed UHS-1 cards I've used in the D7000 (a Transcend and a ProMaster, both 16GB) have gotten card errors, which I've never had happen with any other cards. I took the ProMaster back to the store, and they couldn't repeat the issue on the store D7000, but they gave me a replacement card anyway. This all happened while traveling -- when I got home, the replacement ProMaster started doing the same thing. I contacted Nikon about the issue, and was told they wouldn't address it or take the camera in to look at since these aren't cards on the official compatibility list. The cards work fine on the P7100 so I've kept them.