When using a Trezor, it's important to use the passphrase option which is a 25th seed word that will alter the internal hash used to generate your wallet addresses. If the firmware isn't compromised, you can still lose all your money if you lose the device if someone happens to have the skill and $100 of electronic equipment to read the internal board.

BTW, you misspelled Trezor as tezor in the keywords section. It could affect visibility of the post.