Robert Wetzel
Google
Very solid choice for anyone. Friendly, multilingual staff, good breakfast (everything there, choice of rolls could be wider, but the coffee is amazingly strong). Flexible payment methods.
Where it really shines is the style. Rooms are very spacious, extremely tastefully decorated, beautiful and generous bathrooms. Furniture is top notch, and of course everything is clean. Air conditioning is available for a modest premium.
Only downside is the heavy tram traffic which can be heard with open windows, but closed it's silent.
Overall, they are great. Clear recommendation.