The apartment was centrally located in the city and was within walking distance to all the top tourist attractions. We walked from the Louvre back to the apartment as an example. There was 3 of us in the apartment and did not feel crowded. It's on the 4th floor with no elevator. There are also plenty of restaurants in the neighborhood and the subway station is 1 1/2 blocks away. It has heater but no A/C. We felt totally safe walking back and forth and around the neighborhood.
This apartment in the Marais is as described .. it is well-situated, reasonably accessible (level 3, no lift), and quiet. It has all that is needed for a relaxed break in Paris. It was clean and well furnished. The beds were comfortable, the bed linen excellent. Access and exit arrangements were simple.
We'd stay again.