Junk from China?

I ordered 2 microSDHC, Class 10 / UHS1 Toshiba 8GB.
After I had recently had bad experiences with the flash memory media of a large Elektronikmartkes (USB flash drive and SD card) I have searched and found this time on the Internet.

The delivery went pleasing quickly and lasted less than 1 week.
The SD cards were boxed and it was per microSD adapter to its default size in - which was not mentioned on the product side, but a comfortable bonus.

I tested read and write access, both with Windows FAT and Linux ext4 filesystem. The write rate was continuously 11-13 MB / sec, the reading rate between 30 and 35 MB / second, both with many small as well as large files.
Class 10 and UHS1 demand> 10MB write / second and read> 30MB / second, therefore corresponds to the item exactly the description and myself is extremely happy with the product - at least that's definitely not junk.