Christine's studio is literally 200 meters south of Pigalle metro station. The zone is well connected and has convenience stores all around, as well as numerous pubs. Unfortunately though, the Paris municipality doesn't do a great job regarding garbage pick-up in this arrondisement.
The studio is around 4x4 meters, good for an individual or a couple for a couple of days if you're not planning to stay in a lot, given the small size of the bath. The outside photos you see in the listing are mostly of what you see through the window, not the apartment. The place itself is petit but you'll find it equipped with everything you need, short of a washing machine: microwave oven, iron, hair dryer, corkscrewer, tin opener, pots, pans, and also the basic consumables like sugar, salt, coffee and shampoo. You have digital TV at your disposal with full HD and a fast internet connection through wifi. The only downside I can think of is the electric and water installations, which don't look very solid, with some loose wall plugs and patched water pipes.
Christine was very welcoming and flexible, and she communicated perfectly before and during our stay. We met her before leaving and she was very kind.