I work with a large DSLR and a compact camera. So far I've only ever 8GB SDHC Class 10 cards used here. Now I wanted to accelerate the storage of the images in my Canon SLR fundamentally, since the camera has a rather high burst rate. In short, well ... I have a feeling this 16GB Ultra High Speed card is slower than my conventional simple SDHC cards. For me, a big disappointment.