I stayed at Flora's place for three nights with three girlfriends. The place says it can fit four, and we did so with ease. It is not as much space as we are used to but it was really nice to live minimally, and we were impressed with the clever use of space. I think the space is good for four friends, probably for two couples though it might be a little tight if you need privacy. We loved the neighbourhood, it was very authentic and close to good shops and bakeries, and close to Gare du Nord and other lines so public transport was very easy. It is about 15 minute walk to Sacre Couer and the quintessential Montmartre district you see in movies and pictures. We really enjoyed our stay, couldn't have asked for more from Flora or the space.