I studied for several years in Trier and thought to stay one day at this hotel. now being back after many years I did and was not disappointed. The stuff is friendly and service is good. Not sure if they have an international 4 star ranking by certificate, guess they are somewhere between 3 and 4 stars. I am luxury hotel design professional and think Nells is doing a good job. I was happy with my stay overall.
The room information leaflet was a bit hidden, could be improved to be easy to find.
Fresh fruits on the room would be nice and gives the chance to place a knife in the room.
No complementary water, no coffee, no water heater, things to improve.