The USB 2.0 flash drive from Kingston, who was also gefertig of metal and fit perfectly on your key ring, managed with large files good 6MB / sec. So if you times it wanted to pull a 4GB .mkv, then you could choose from time do something else.
The JetFlash (64GB) provides the USB 3.0 with me 24MB / sec. Contrary to some other reviews, would talk about intense heat I say, it heats up. But never so strong that you could not tackle him.
The attached picture was taken after copying of nearly 31GB. The stick was then tepid. The DT SE9 has since mE heated much more.
... And to come back again to the beginning: I do not need the drive and 33 euros was already in marginal price range but after the part corresponding to 100% of the specification and is even smaller than I expected, I was 100% happy with the decision.
Anyone looking for a "Always-In-USB-Stick" with good performance should grab undoubtedly the 64GB version (because of 24Bm / sec).