The experience of some slow speed, I can not confirm. I've run PortableApps on the map and can therefore judge the speed of the programs that are running well. Especially with many queries with small datasets breaks the card. My old Sandisk Ultra II 1GB is clearly superior. Who needs to transfer large amounts of data, has any benefits, the card is, however, for applications with many small amounts of data could not be recommended. Note: I have tested on several PCs / laptops / SD card reader with always demgleiche n The result map.