Julie was quick to respond, helpful and full of great recommendations. The location is in the lively heart of Montmarte with lots of bars & restaurants at walking distance which is great but also means lots of noise at night. There were some obvious issues as I've seen mentioned in other reviews: there was practically no space for us to to keep our stuff. The fridge, the cupboards, even under the bed; everything is occupied already. Quality of bedding and the sofa bed are just passable. And lastly it could really do with a more housekeeping in general.
Conclusion: Location is good but the apartment is not fit for 3-4 people as advertised unless you are passing through for a night.