Personal and/or professional account? Go for it!
Use for personal and professional purpose since a few years now, international transactions made around the globe used to cost me fortunes! It is all gone with N26 now.
Thé online banking solutions provided by N26 is perfect. From registration to everyday use, I never ever came across any difficulty. 
When you need an interactions with their customer support, questions are solved rapidly and flawlessly. 
On the top of that, even the design of the card looks cool!
I used to use many banks (and online banks) in my life, N26 is so far the best I cam across !