For a conveniently located hotel (right behind the Louvre), Le Relais du Louvre is hard to beat. You can walk to many attractions, such as Notre Dame de Paris, Sainte-Chapelle, and the Musée d'Orsay. Restaurants abound in the neighborhood.
All the staff were cheery, helpful, and easy to communicate with in several languages. Sophie in particular doubles as a well-informed concierge. She can book restaurant reservations, the airport van, and taxis for you. When we arrived on an early flight, she arranged for our room to be readied while we sat in the lobby for half an hour--very welcome to weary transatlantic travelers.
Rooms are not large, but then few Paris hotel rooms are. Ours was clean and had a modern bathroom, small refrigerator, and room safe. Breakfast is served only in your room and is rather pricey; you may prefer to walk to a cafe. Free wifi worked well.
One word of warning: Specify what currency you want charged to your credit card. If you have a card (such as Capital One Visa) that does not add an exchange fee, specify a charge in euros and double-check that your receipt reflects this. Otherwise you may be billed in dollars at a poor exchange rate. Sophie will put it right if you ask.
We'll be back.