We spend 3 nights at Natalia's place with two small children and were very happy and had a great time. The location in the middle of LeMarais is fabulous and also has great Metro access at Saint Paul 4min away with a straight line to the Arc de Triumph and Champs Elysee. There are also delightful restaurants and bakeries literally on the same street and some great shopping opportunities everywhere around. Great value for money and definitely recommend.
only thing to watch out- 3rd floor with no elevator. but we managed even with a stroller ;)