I have been living in several countries of Europe ...

I have been living in several countries of Europe and have been to many hospitals before (both private and public) but UZ Leuven Gasthuisberg is the number one I have seen till now. Even if most of the buildings are not from this decade, they are very well maintained and extremely clean: hand sanitizers and masks available everywhere.
Their service and administrations are super-friendly, highly organized and have a very user-friendly app that helps you to follow-up your results and check-in to your appointments without going to the counters. Free WiFi is available throughout the buildings.
The medical care is very attentive, proactive(!) and detail oriented. The doctors are aware of the newest technologies/researches etc and can give you an extremely good diagnose and information. This university hospital is the Golden Standard in European healthcare.