As soon as received, soon installed in a Sony 15 MPixel camera with the SD / MicroSD adapter (good idea). Immediate recognition of the card by the device Use carefree, whether in camera or HD video. Same for the installation (without adapter) in a smartphone, a tablet (for movies) or a reading light (although in this case, it will beauuuuucoup 16GB pounds) Speed side, tested on a laptop DELL Latitude (with adapter) to recover the photos, read transfer rates are excellent, 40 seconds to 5 files 1GB (40MB / s), it is even faster for one single file, puisque'il only takes about 3 seconds to 1 GB (> 300 MB / s? I confess I have not even had time to click the "more details" tab for Copy As Win7) In writing, whether for large files (video) or smaller (photos) you turn around 10/11 MB / s. This speed is more than enough for a camera, even in movie mode. The (relative) slowness in writing will not be felt if you wish to use the card to transfer data or copy movies on a tablet. For normal use: ALL GOOD!