The Eurostar arrives in Paris at Gare du Nord, the North station. Hotel Marciano and Hotel Saint Quentin are just outside the station. Both are simple, but decent and very reasonably priced. Good location too. It is a good area, very colourful and busy. Lot of restaurants, cafes and shops. It is easy to get around by metro, it stops right there. I usually walk, the center is not that far, maybe half an hour. Montmartre is even nearer, I always like a stroll in Montmartre. I am not saying this is my favourite location in Paris, but it is a convenient one.