This is a brilliant little flash drive to use with a laptop or PC. Indeed, its so small, I can leave it plugged in to my Huawei MateBook when I travel and commute. It is a bit of a tight fit but its not a problem and at least it won't fall out or give errors if touched.
I did a couple of quick checks with h2testw and CrystalDiskMark (see photo). I won't bore you with the gory details. Suffice to say that when connected to a USB 3.1 port, it performs as expected - even after a period of sustained use.
When heavily used, it can get warm to the touch but not hot. Indeed, its well within its specifications (which, temperature wise, are quite generous). I suspect it uses the USB socket and laptop casing to dissipate some of the heat. My MateBook is aluminium which may explain why it runs cooler for me when compared with other reviewers.
I'm not so sure about the small slot for attaching the device to a keyring or lanyard. IMHO it looks a tad flimsy. However, as I tend to leave it plugged in, that's not really an issue for me.
Thus far, this little device has proved reliable and performed without a hiccup. Time will tell as there's little point in having a storage device you can't depend on!
UPDATE, November 2020.
I have now also purchased the 512GB version as it was on a special Bargain Fox deal at £54. It also works well as advertised - again, I'm chuffed!