I have been using this device flawlessly for almost two months now, never missed a trade, never lost any BTC or ETH. All transactions have been recorded on the BTC and ETH blockchain. Its been totally offline and secure. my private keys are generated offline and only seen by me. My BTC/ETH addresses are easily stored on SD card (or paper). And all the addresses I have ever created or currently being used are saved in offline file folders and conveniently organized for quick access. I can generate addresses and store BTC while sitting in the park or in traffic, and I have never needed a PC or laptop to do this ever. . .  Video update for the last month can be seen here, . . . https://www.youtube.com/watch?v=2flm-JuE4qM&t=7s