I spent a week at Jeremie's apartment and it is ideal for a solo traveler, small but equipped with everything you need. It's in the heart of Le Marais and surrounded by restaurants and cafes, but is on the top floor (there is an elevator) and you can't hear anything at night. A lot of sights are within walking distance, but if you're not a walker the metro is 5 minutes away. I would definitely stay here again.