Location location location! We love this compact and cozy studio in Latin Quarter ! Only 3min from Metro line 7/10. A great Italian restaurant just downstairs across the street. Laundry place two blocks away.
It's window is my favorite spot: unlimited street watching simply by sitting near the window! One day we heard beautiful singing from a young girl walking by - it was serene...(at night make sure you close the window to block the sound tho. :) )
Besides visiting the big spots, remember to put aside half a day to explore the neighbourhood.. go get some fresh produce at the Wed/Fri/Sunday market just right outside Metro 7 Place Monge stop. A bit further down there's Carl Marletti , best dessert store. For culture visits, there is Pantheon ten minutes away & the apartment buildings that Hemingway and René Descartes used to live in, the list goes on...
A true Paris experience.