[confounded]

If you like your hardware and software free and open (or like to support smaller businesses) there's also the NitroKey:

https://www.nitrokey.com/

Not quite as slim, but to me at least, cooler.

Made in Berlin!

[Cthulhu_]

Being open is really important in this case - I can't be sure there isn't some government backdoor in Google's keys, for example.