This is a great apartment - it's very spacious, comfortable and well-located.
The living area has a large sofa and dining table, with access to a narrow balcony that has great views - one direction looks out towards the Sacré-Cœur. Being on the 6th floor, it's very light and airy.
The kitchen is well equipped and with modern fittings, although the appliances were not all that intuitive to use (my friend and I ended up only figuring out how to use the microwave!)
I stayed in the master bedroom, which is in a kind of loft above the rest of the apartment. This was very comfortable, with a queen sized bed and en suite bathroom (although there was nowhere to hang clothes). My friend stayed in the larger of the two downstairs bedrooms with the convertible Ikea daybed - she said that the size of the room and the 'double' bed were comfortable for just her but thought it may not be as comfortable for two people to share. The other downstairs bedroom is quite a bit smaller and set up as a young child's room. Next to these two bedrooms is a large main bathroom with modern fittings and an internal laundry area.
The apartment is very well located in the 10th arrondissement, which we found to be a very pleasant area. It's within walking distance from Place de la République, a lively area with lots of restaurants and shops, and in the other direction is the canal, by which there are some very nice bistros. Just next to the apartment is a small supermarket, across the road are a lovely bakery and patisserie, and a few meters down the road there is a metro station and bus stop, so very convenient for travelling to other areas of Paris.