Ok...the people giving these bad reviews are completely uneducated....allow me to clear the confusion. This does work with the Trezor and it also does store up to 24 words. The 24 word slots can do just the first four letters of each word because they are within the BIP39 word list. In other words no other words will have the same 4th letter in all your generated words.
So yes this does store 24 words and it will still works even with just the first 4 letters of the word as the unit allows. Just buy it. It's amazing quality, heavy duty and worth the investment!!