The card is very fast. Sandisk 30MB / s version is faster, but also much more expensive! Use in the Canon EOS 550D: no compatibility issues, video recordings (Full-HD) no problem - the cache is hardly resorted. Respect. the number of continuous shooting, I can not make any statement, because I have no comparison map.
Unfortunately, a storage box is missing.
Conclusion: Very convenient and fast card. I would buy me again!