Too slow for USB 3.1
Of course, at such a price, you don't expect something much faster, but you can get USB 2.0 and have the same speeds. I always talk about NTFS. In large files, it starts at 15-20 mb/s, but after a while, it drops to some kb/s and goes up again and down... better to use USB 2.0 with a steady 4-5 mb/s

For 10€, you get what you pay for. At first, it seemed fast, but as soon as it started to fill up, its speeds dropped to zero, to the point where it doesn't read anything. The build quality is also worth its price.
It's terrible with everything, but for the money, it's just right.

Okay, it's a pretty good USB stick, it's not very fast but for the money it's good. It supports USB 3 and achieves the following speeds:

READ-> 108.5
WRITE-> 13.75

A mediocre USB stick is not the fastest, but €3 for 16 gb (14.4 are available) is okay

The worst USB stick that has passed through my hands. The write speeds are at least disappointing, going from 0 to 24.5MB/s...very slow. It took 4.5 minutes to write a 2.92GB movie...in contrast, the same movie, from the same PC, took 30 seconds with the Sandisk Extreme Go 64GB USB 3.1.
The read speeds are tolerable.

Quite good. If someone takes into account their money (I bought it for 10.24 euros, 64 GB), it is a good purchase. I measured the speeds with the standard benchmark of the disk application Linux Mint 19:
Average Read Rate: 211.4 MB/s
Average Write Rate: 26.4 MB/s
The write performance is not the best, but for playback it is quite good. Definitely, the performance improves if someone formats it in the standard format of Linux (EXT4), but I preferred to do the measurements in the manufacturer's format (FAT32).

For USB 3.0 to have such slow read and write speeds, it is truly disappointing for Kingston...