I still find the idea behind sofortüberweisung shady. Maybe they're actually the nicest people in the world with the best security practices known to humanity, but I still won't hand them the login credentials to my online banking or my card's PIN.
They actually admitted (2011) that they scrape the last 30 days of transfers of your banking account.
German Source: http://www.golem.de/1105/83811.html
