Ask HN: What do you think about the Secalot hardware token?

Comparing open source security tokens/OTP generators/UFA tokens/PGP Smartcards, it seems the product from secalot has the most features for a similar price as the alternatives. It also has open source software and hardware.

https://www.secalot.com/

Has anybody tried it and can compare it to more popular alternatives like the yubikey or the nitrokey?

How would you rate this from a security aspect?