Use a passphrase, please. https://trezor.io/learn/a/passphrases-and-hidden-wallets
Discussion
I like how Trezor's mindset is not trusting even themselves so they introduce a feature that protects users even if the hardware is compromised.
There's a chance to get the keys out of Trezor (or any other hardware wallet) - you need very expensive equipment, knowledge and an access to the device. That's why a passphrase is a really good idea.
https://blog.kraken.com/post/3662/kraken-identifies-critical-flaw-in-trezor-hardware-wallets/
Yep, I know about this. Can't wait for Trezor to come up with their own Tropic Square chip. It's gonna be a game changer.