Pros:

• You can now carry your BTC and ETH everywhere through this hardware wallet. No need to worry about your online wallets being unsafe
• The backup is stored in the SD card. So as long as you keep it in a safe place, the security of your crypto coins will be ensured

Cons:

• Of course, since this is a very minute object, there's a great possibility to misplace it. Better keep it with multiple hardware wallet backups.