Lauren's place is amazing value and in a great location too. Montmartre is lovely - it is walkable to the very centre of the city but you get the benefit of this lovely neighbourhood too. It's really picturesque, and there are lots of restaurants and bars nearby. It's also close to a couple of different metro lines for longer journeys and also a short walk from Gare du Nord if you are arriving by Eurostar.
The flat is really good. Two big, comfortable bedrooms and a cosy living room/kitchen which was great for two friends travelling together. Everything was clean and the kitchen is well equipped. It was very much like staying in a friend's home so will most suit people who like using AirBnb to get an authentic feel of that city, rather than those expecting a posh but less personal place to stay.
We didn't get to meet Lauren, but she was really easy to communicate with if we had any questions, and she left good instructions for getting into the apartment.
I would highly recommend staying in Lauren's place if you're looking for a comfy and good value base in a great location.