Nani and his wife Mary were the perfect hosts. Not only were they there to welcome us but they also they very kindly let us leave our case there on the morning we left and pick it up later, rather than having to take it with us until we went to the Gare du Nord at lunchtime.
The apartment is very good and extremely well equipped - I really can't think of anything it lacked. It's easily large enough for 2 people and much nicer than a hotel room in that in addition to the bedroom, there is the separate lounge / kitchen area.
The area is wonderful - lots of bars, restaurants and shops and very convenient for the metro. You can walk to Notre Dame is about 10 minutes and the Sunday market in Place de la Bastille is 2 minutes away. But one of the main advantages of this apartment is that although it's right in the centre of things, it's also amazingly quiet - which makes getting a good nights sleep after a long day sightseeing very easy.
I would definitely recommend this apartment and Nani and Mary were wonderful hosts - so nice and so helpful.