Is kosync.eu a Koreader server hosted in Europe, legit?

Does anyone know if this server is legit? I'm looking for an online reliable and secure KoReader server to sync my devices. If we go to the privacy policy link at the bottom of the page, and translate from German, it shows that the site/server is run by Digitmedia.de a virtual and augmented reality experiences services provider.
kosync.eu

Checking if this is legit, and if yes, how's the experience.
Thank you