Had a pleasant stay at Mercure.
I was very pleased with the room. Very clean, it had a big, comfortable bed, a very practical desk, a small fridge, very generous closets, well placed TV, big windows equipped with curtains that totally block the sunlight. Breakfast, while expensive, offered many options (both vegan and non-vegan). Location is excellent, at walking distance from city center and connected to the Radboud University campus via line 10. I could hear the sound of trains, but it was never a problem.