We have 2 reviews in PDF format:

The Magic Circle – Magic Circular
http://www.jonathanallen.info/EMHC.review.Vienna.2019.©J.Allen&TMC-.pdf
3 pages, English

Magic Circle Austria – ALADIN
https://emhc2019.files.wordpress.com/2019/11/emhc2019_aladin.pdf
12 pages, German

In the meantime two reviews of the vienna meeting are online:

Ian Keable:  
http://iankeable.co.uk/index.php?option=com_acymailing&ctrl=archive&task=view&mailid=103&key=tVrWR4eR&subid=2-PohweGTnJNXOWR&tmpl=component&fbclid=IwAR3zzJ6jODS_SXHmivaD7j-OFKAxORhBNQwZ78X1EhKPqZfrzCPhypAGYbU

Jan Isenbart:
https://zzzauber.wordpress.com/2019/08/26/some-collected-impressions-from-the-8th-emhc-in-vienna/