Christine's apartment is charming and quiet, with the children's bedroom and the very nice terrace it was a perfect match for us (two adults and two kids). The beautiful "Buttes Chaumont" park is right across the street, providing an opportunity to get some exercise, to take a stroll and enjoy the scenery (including a view of the Sacre Coeur), to picnic or to take a break in one of the cafés.
The flat is close to Belleville, with lots of Asian shops and restaurants, and with the metro or bus other touristy and trendy parts of town (such as le Marais or the st. martin channel) are also close by.
Everything else about the apartment was perfect - towels and linen were provided, everything was clean and orderly, the washing machine, kitchen and internet also worked and were labelled with mini instruction sheets.
Although we only met once, Christine seemed like a very nice person :-) she was also available via phone to answer questions, and always replied quickly.
Highly recommended, not only but especially for families visiting Paris!