The SanDisk Extreme 64GB is a very fast USB stick 3 has proven to an Intel USB 3 controller his speed. He reached while writing about 176MB / s and reading 209MB / s These are good results that can be seen. The stick works through his cheap plastic surface and the sliding mechanism is not just quality. Whether that works long has yet to be seen. At the look and slide SanDisk could still working on it to this fast USB stick 3 to give something more tangible. That should be but rather secondary to the function.
Overall, the SanDisk Extreme makes a good impression with which to copy files quickly = write and can be read.
On top of that also a software located on the USB stick.