I own this mitlerweile 12 SD card and had been not a single failure or faulty data. To use these come with me in three Canon EOS 550D and EOS 60D in one. Here Full HD material with 45mbit / s is usually stored and has been for many film productions away properly. While it is no envelope to, but because I always a great bag for the many cards use, for me not relevant. The read / write speed saves time and reliability creates security. A super product that Transcend delivers there, favorable price and after simple registration and "Lifetime" warranty. The simple packaging can be easily opened by hand. All in all, that makes me 5 stars!