Location! Location! Location! The Le Marais Quarter. And - clean, quiet, secure. Two locked coded doors to go thru to get to the apt door. However, this old lady had absolutely no fears wandering around alone in the neighborhood at night.
The apartment is in the first floor. It is very, very quiet. I never heard any voices, etc.
It has a combination washing machine -dryer!
A grocery store is a block away and a great bakery is right on the corner of Blvd Beaumarchais and St Sabin (sp). There are also plenty of restaurants around, but I was on a tiny, tiny budget so I didn’t try any.
Blvd Beaumarchais is on the 65 and 24 bus lines which go to the Bastille bus stop where you can change to about 10 other lines. The 65 also goes to both Gard de Nord and Gard de Lyon. St. Claude is the bus stop nearest St Sabin. There also is a subway stop about a half block away. I did not use the subway because I find it mystifying and because I would rather see the neighborhoods as I travel. Get yourself a free Paris transit map where they sell tickets and have fun!
Enjoy!