A group of seven of us (three couples and a single) stayed here for 4 nights at the end of September 2012. Overall we had a lovely experience and greatly enjoyed the trip. Would generally recommend others to stay here with just a few pointers below to note.

The apartment was in a great location in a quiet side street, just a street away from the action. It is very pretty, clean, and definitely on the large side for a Parisian apartment. It is on the top floor and has lovely views. Easy to walk/metro to all the places you'd want to go. Justine was easy to contact and kept in touch with us a number of times during the rental.

The only things to note that I feel were not adequately explained in the listing:
* The apartment is at the top of 119 stairs, with no elevator. Wasn't a problem for us (helped to work off all the good food) but would be a problem with children/injuries/elderly etc.
* There was an extra charge of 15euro per person for sheets and towels not mentioned in the advertisement
* There are two bedrooms downstairs that are private, but the two upstairs are not as private. One you need to walk through to get to the terrace and the fourth bedroom. The fourth is a very low ceiling height room (most people will need to stoop) on the other side of the terrace that contains the other half bathroom mentioned in the listing. It is really a full bathroom in one sense - it has both toilet and shower - but the toilet has no door, and because of the glass door from the terrace you can see through to both the toilet and shower if you try (although in normal use you'd only do so accidentally - sitting on the terrace at the table you cannot see in). It is also quite difficult to shower because of the height of the ceiling!
* The kitchen would be small to prepare meals in (we didn't), although I feel this is true of a lot of Parisian apartments. There were many options to eat out.
* Due to the location of the second bathroom, really all but one or two of the people staying will be using the other bathroom. Five people for the one bathroom was pushing the limits - so less than seven people would make the stay more comfortable.

Overall we had a lovely time, thanks Justine!