Immediately after delivery, I have to check the stick with H2testw compare to the speed of USB2.0 and USB3.0:
Read: 26MB / s
Write: 22 MB / s
Difference USB2.0 to USB3.0 virtually non-existent (see pictures)!
Although the first delivered Stick had bad sectors, which has found the program in the second run, but the exchange was not a problem and now I have the stick already several weeks at my Wii U without any problems.
I recommend every 2 to 3 runs with H2testw to make sure to have not heard a defective copy and admit for a price-performance ratio five stars.