No account for You!!!
I tried to open an account and received the "we can't open one for you or tell you why not" email. See below what I left for a survey from N26:

I did not open an account as I was informed via email N26 could not open one for me and no explanation was given.  I assume since I am an American although I am a legal resident in Italy.  After the denial I requested N26 discard any of my personal information and was asked if I wished to close my pre account.  I did not know I had a "pre account" so I answered yes.  I was then advised to download any data I needed from my account before it was closed. Hilarious as I never opened the account.  Now I am asked to give a survey as to why I closed my account, the account that never existed...

If this is German precision banking I want no part of it.  I am absolutely amazed at how dysfunctional this process has been and what a waste of my time as well.

So, if you are thinking about N26 it might be OK but my experience was these guys are suffering from the old "left hand doesn't know what the right is doing" syndrome.