The location is perfect. It's close to everything, and at least a walkable distance to everything else. Staff is very friendly, effective and useful. Rooms are of a decent size and bathrooms are very comfortable, with modern plumbing and décor. The breakfast provided by the hotel is not worth mentioning, but across the street there is a very decent café with a breakfast menu, highly recommend the "yogurt + strawberries" breakfast.
What is not good is an absence of elevator (the porter will help you with your bags up the stairs, though), and very inefficient air-conditioner. For the night you can open the window or the balcony door and enjoy some cool breeze from outside; for the daytime there needs to be a working AC system, and it is not working well enough.
Also worth mentioning here - Uber cars are not allowed to get to the hotel's doors, we had to walk to the street corner at Via Triton and get the into the car there. Taxis seem not to have this problem as long as the taxi is a regular sedan type, not a minivan or SUV. This hotel is located inside the TLZ -traffic limited zone- so you cannot drive up to it without a fine.
Anyway, our stay was pleasant and mostly problem-free.
Thank you Trevi41 Hotel.