We stayed a Bastien and Ingrid's apartment for 5 nights/6 days this April, and we couldn't have asked for better hosts. We weren't able to meet them in person, but they gave us a complimentary bottle of wine and brioche for our stay (thank you!). Staying in their place really felt like having our very own pied-à-terre in Paris. We cooked breakfast in their well-equipped kitchen and had meals in their airy dining space. They also put out complimentary toiletries in their bathroom in case you run out of stock. It was also a blessing that the apartment building was equipped with an elevator (though quite claustrophobia-inducing...but this is Paris anyway), so we didn't have to worry about lugging our suitcases in the stairway. The place has a washing machine, so that saved us a lot of time going to and from the laundromat.
The best part: their apartment is located in a charming neighborhood near Bastille where almost everything is accessible--the metro, 2 supermarkets, a lot of restaurants, pâtisseries-boulangeries, a bus stop (which fortunately is a stop for Bus 69!), and rôtisseries!
I would definitely recommend this place to any traveler who wants to stay in Paris for a few days, outside of the usual tourist haunts.