Hallo !
I did my 737 TR at the FSB. Really happy about it. 32 hours FFS 737-700, 2 hours 737-300 and 4 hours of test.
In addition, they offer a paid line training (as F/O) of 100 hours with Germania (HLX.com). In addition they really have good connnections with the market and can sometimes (worked in my case) recommand and place their students (particularly if you speak german).
As a matter of fact, the school is onwed by an Air Berlin senior Capt as well as a Germania Cpt. As a matter of fact, a lot of people have be placed to Air Berlin in particular.
Accomodations and life in Berlin is really cheap and interessing !