Alexis' space is really nice. Recomend.
Excellent location in St Germain/Pont Neuf. Small and compact space, but enough for a young couple to stay a week exploring Paris. For 3 people would be really tiny.
The bathroom is great (shower, hot water, heating for the towels).
The bed is "in the ceiling" and the stairs are steep, but very confortable for a young couple.
Self check in and self check out. Good wi-fi.
Small fridge, microwave, stove, basic products and utensils. Quiet. 2nd floor (no elevator). The apartment is really small (as you can see in the photos), it's a classic parisian studio, so there is no space for the luggage/clothes and it will stay on the floor (no problem for me).