Overrated how?
And an arrogant prick? I guess you know him personally?
Overrated? He may be talented, but he's not even close to world class. Just look at his performances with the German NT, also with Gladbach in the Euro League he wasn't exactly brilliant. I really dont get it why he's Loew's Number 3. Weidenfeller, Trapp or Baumann would all be more deserving IMHO.
And no, I don't know him personally, but have watched/read quite a few interviews with him, and he doesn't come across as a very humble person.
More like over-ambitious and uptight, but I must admit: arrogant prick was maybe a bit harsh.