Penelope's studio flat is just what we wanted and expected. It is compact but has everything you need. It is right in the middle of a vibrant part of Paris but tucked away above a private courtyard (full of plants) and completely quiet. There are so many bars and restaurants within easy reach that you are spoilt for choice.
Just down the road is a superb daily covered market (Aligre) with an additional fruit and flea market added on Thursdays. The most surprising local amenity is the former railway line which runs across Rue Ledru-Rollin but above the street on a viaduct. It is planted with masses of flowers and shrubs and gives you a country walk through the whole district.
The nearest Metro at Bastille (10 minute walk) has a direct line from Gare du Nord and from there you can reach all other parts of the city. You can also walk down to the Seine and over the bridge to Austerlitz where you can get the RER to Musee D'Orsay or beyond to Versailles.
We had a great few days there and would recommend to any couple who want a reasonably priced stay in the heart of Paris.