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They are both reputable, and used amply by people around here. A few (non exhaustive) things to consider:
- The device is not a 100% safeguard, meaning that it could at some point break down (i.e. screen could fail, device may not be readable, etc.). It´s not something frequent, but given time, all hardware may have issues.
- Because of the above (not only), it’s actually very important to keep your 24 word mnemonic in a very safe place. Were the device to fail, you can always regain access if you have the mnemonic.
- Hardware wallets have in the past encountered issue with outdated firmware (i.e. Ledger changed their management software at a certain point in time, and certain devices with older firmware versions became no longer usable on it). That should encourage one to update the device’s firmware every now and then.
- You may consider using a passphrase to hide some accounts as an additional security feature. Both devices allow this, but you need to read and understand fully what it entails and how to manage it (the information is available on each of the device’s original sites).
- Always purchase the device from the original site, or an official reseller, and check that it hasn’t been tampered with (i.e. no bogus prefilled 24 word mnemonic card, etc.).
- Due to some data leaks in the past (Ledger is a master, but ultimately it could happen to any supplier), if you can, try to make the purchase without providing your complete real identity, phone and address. Not always simple to bypass this one, but if feasible, worth considering for peace of mind.