This Mercure is oriented to travelers for hotel meetings, or an overnight stop on a business trip. The room was quite basic, although it did offer a desk chair and another chair to sit in. Space was limited. The bar essentially offered white wine or red wine, no nuts or other nibbles...and breakfast was a large buffet for some 18 euros if I remember correctly. We found a good coffee shop across the plaza. The hotel restaurant is an incorporated Italian restaurant, TonTon Aldo, which was OK but nothing to write home about. Free parking means parking where you can find it, in the lot across the street or street-side. If you drive somewhere, as we did, you'll search for parking on return. The best thing is to get up early on the day you leave and park alongside the hotel before business hours, so you can get your suitcases out and to your vehicle.
The location is good if you have business at the port...and it's a reasonable drive to the Carnac area where there are myriad menhirs, dolmens and other megaliths.
Staff were friendly if overworked! The reception clerk also served as the bar attendant part of the time.