I like my ledger nano s, but basically any ledger and trezor products and safe and easy to use. Combination of hardware wallets and safe back up offline storage will make you sleep fine.
They are safe only if you buy them directly from the manufacturer, and not from ebay or anywhere else... On ebay, there's a kind of scam that the seller sends a brand new and unopened hardware wallet (which is fine and usable, without any tamper or modification) but sends also a 'unique' and 'individually generated' seed (12 or 24 words) on a piece of paper and the instructions, to set up the hardware wallet with that seed. In this case, if the buyer sets up the hardware wallet with the seed of the scammy seller and starts to add funds to the hardware wallet, the seller can easily move the funds to another address with the same seed...
So stay safe, and buy directly from Trezor or from Ledger...