Chose hotel for location, which was good for what I wanted (car park nearby for hire car) and restaurants for dinner.
Reception staff sufficient but not what I would call a warm welcome. Hotel is clean and everything in the rooms well, however, by going for ultra modern, it lacks comfort. The bed was so low and having a big louvre type divide from the bathroom that swung out to the bed was strange, as you need to learn around.
You do get refreshments included in the lounge area, but don't get excited, it a coffee machine and a fridge full of tomato juice. Did have a nice slice of lemon pie though.
Would I stay again, no is probably the answer. An old city like Nantes has many hotels that offer charm, unfortunately this is not one of them.