I hope I haven’t missed anyone here, please do add to the list if I have!
The first blog post I found was from one of the awesome speakers @mr.slavchev
http://mrslavchev.com/2017/10/16/testbash-germany-2017-wurst-practices-and-trolls/
The second was from another one of the awesome speakers Elisabeth Hocke
Maik Nogens collated the experiences from the many members of the XING team that attended the event