We are family of 4 and we recently stayed in this apartment for 6 nights. The location is fantastic with lots of restaurants, patisseries and boutique shopping. It's a 5minute walk to Saint Paul metro station which is on line 1 - a major hub line for Paris. There was a 2 person lift in the apartment which made moving the luggage to the 6th floor manageable. The check in/check out process was very efficient and the communication was exceptional.
In the apartment, there are 2 double beds which are comfortable but the rooms are very tight and the second bedroom has no external window. Unfortunately due to the hot weather (mid 30 C) we experienced during our stay, the apartment became quite hot which made sleeping at night very uncomfortable. Although we knew there was no air conditioning, we really didn't expect the apartment to be as hot as it was. Fans were provided which offered some relief.
The living/dining and kitchen areas were very spacious and well presented. The toilet room which runs off the hall is super small. The main bathroom has a reasonable shower and is well presented.
Overall the apartment is very clean and tidy. We would recommend this apartment for all seasons except peak summer.