Prices from 74€ to 257€ are a bit to much for my taste for something that was never independently tested and reviewed.
What kind of review you expect when we talk about a piece of metal?

All that are just a fancy things, you buy just because you like it (and/or want it), not because you really need it.
Steel plate, washers, Morse code - you may live without it. It is as needed as silicon case and protective hardened glass for you hardware wallet. If you like it - just do buy it and enjoy. If you think spending $100 for piece of metal is too much - do not.