Check
Pilotenboard.de :: DLR-Test, Lufthansa, AUA, ... :: Infos, Ausbildung, Erfahrungsberichte :: Index or
www.Pilots.de, there is quite a bit of info, however as there were no assessments for around a year it is of course a bit dated. Should be still valid though.
German should not be a problem as it is required anyway.