we had a really good time in the flat..that is exactly how it shows in the photos..everything well organized and the place is originally designed...the double and split bathroom is practical and in the photos maybe it's not easy to understand but the bedroom is directly reached from the main toilet room...regarding the extra bed on the top of the main room is acceptable once down in bed but you need to know the hight keeps you crawling...not for small kids or elder people...
the view from the apartment is stunning and you will have plenty of light even in dull days...the area is very parisian and in 10 minutes walk through bd beaumarchais you will be in place de vosges...marais...you can walk to bastille less than 1 km and you will be easily connected with the tube to all paris...you are very central..without paying extra everything as in the proper marais...
i really suggest this solution