All hardware and software fully open source. Can be made with parts you can buy anywhere so increases privacy. Completely stateless so your seed is not stored on the device therefore can’t in any way be retrieved from the device. You can also use with multiple seeds & wallets so you can access a multi sig wallet with the one device. I’m fairly new to it so definitely DYOR but based on some demos of it and looking into it myself, I think it’s a great solution.