Like this product, there are many other products that focus on allowing one to back-up crypto-currency wallet seed phrases.
However, they all have in common the following major disadvantages:
* cost -- I can't see myself paying 50+/100+/150+ EUR for such a product, no matter how fancy is the marketing;
* they are meant primarily to encode ASCII passphrases, thus they have low information density; (most formats allow one to encode only one letter per column;)
* size / format -- I want something easily portable, not a large slab of metal, or a heavy paper-weight; (thus I've used the standard CR80 ID card size;)
However, they all have in common the following major disadvantages:
* cost -- I can't see myself paying 50+/100+/150+ EUR for such a product, no matter how fancy is the marketing;
* they are meant primarily to encode ASCII passphrases, thus they have low information density; (most formats allow one to encode only one letter per column;)
* size / format -- I want something easily portable, not a large slab of metal, or a heavy paper-weight; (thus I've used the standard CR80 ID card size;)