On a low-end controller, the debits = 10/6, on a branded player that's okay. By cons on a smartphone worth of class 6 but hey it's tough, reliable, quality after that depends on many paramêtres (size of files transferred, ntfs size / ext) it's still with the best performing kingston. I have tested a lot, some kingston class 6 have the same flow.
PS: Beware of copies of sandisk even Amazon can not rely to its resellers, there is a software that tests the SD / MicroSD / SDHX, search the net is software written by a German dev I forgot the name, it tests the entire surface of the card. There the pot to the roses soon revealed!
I do not put the name, I'm afraid the Chinese fbi :-)
remember there a few years ago, you could test the reliability even know which plant out the cd, well it's the same principle except that here it is the product is tested thoroughly without more information quickly and Will find writing errors (eg a Chinese USB key given to 16 gigas making ..... 8 actually real, we will never copy the entire key, it gives any errors and the world thinks it's because of windows, driver, format (NTFS / exFAT / fat) or whatnot ...
sorry it's a bit long but I think instructive.
