@zack Overall I would like to think that @nitrokey is a nice initiative, but from my point of view all I see is that they start tons of projects (phone, box, keys, etc), and I'm not sure if anyone of them is finished. What I see from the blog is development issues (because it's hard, for sure).
I wish they started with one product and finished it. #yubico seems to focus on hardware security keys, and it works, so I can trust them. I can't say that about Nitrokey, unfortunately.