I've literally tried almost 100 Falafel stalls and shops in the 14 largest German cities (except Bremen), because I am Falafel addicted since I am a small kid.
To make the story short: Sababa Munich is among my favourite four of all time. (in whole Germany)
The shell is not too crispy but hearty, the interior mass is slightly green (means quality because lots of parsley is used), humus and other vegetables for the falafel plate very fresh and you can take as much as you like.
The staff knows about Veganism.