Speed when shooting:
Compared to my Sandisk Extreme III (2GB) this card was just as fast. I could not do as well with the Sandisk in my EOS 50D 6 photos the second. Thus, since no loss can be recognized.
Speed when transmitting to the computer (Mac Pro 8-core):
Once I wanted to transfer the 800 pictures of my first photo tour with this card on the computer, considerable differences have excelled. The transfer will take longer. But for me irrelevant because me the above aspect is much more important. Why but still a star deduction.
Quality:
If after the Sandisk cards in nothing. Very robust!
Capacity:
As mentioned above this card is predestined for trips. As with the Raw Photography and high resolutions! With a resolution of 15.1 MP I can lockermachen 4800 JPEG's and approximately 1280 Raw's!