Floriane is a superb host. She's pleasant, conscientious, and attentive; she also speaks/types fantastic English, which proved useful because my French is limited. She's quick to reply to messages and does her utmost to answer questions and resolve issues. She's also incredibly honest - I think she was concerned that the apartment wouldn't appeal to me at first.
But her apartment is a cool kind of bohemian space; it's got a niche retro vibe that would appeal to people wanting to experience a more traditional take on Paris: think Montmartre meets student flat chic, with vintage gadgets and age-old wear. It's compact but cosy, and it is particularly nice in the evening to sit by the window and listen to the city move with the dying of the light.
In terms of location, it's perfect. It's a short metro ride from Garre du Nord. And for inner city travel, I used the Goncourt metro occasionally, which is two minutes away and thus convenient. But from Rue-Arthur Groussier you can walk to many of the highlights in Paris within 30 minutes. And you should walk, for it's Paris, and you ultimately miss 100% of the charm and and beauty of the streets you don't tread while locked in a subway cart. For example, Le Louvre, Saint Chapelle, The Pompidou Centre, and La Seine will take you through République, Montmartre, and Le Halle, with a rough walking time of 20-25 minutes to each. Moreover, the iconic place for Jazz in Paris, Rue des Lombards is just 15 minutes away, and five on the metro (get off at Chatelet). But closer to home, the canal is minutes away, and there's three parks within a mile radius.
In terms of food and drink, there's so much on your doorstep: Boulangeries, patisseries, cafes, restaurants, convenience stores and so on.
Overall, in terms of the host, the location of the accommodation, and the ridiculously cheap price, this is one the more accessible places to stay in Paris. It was a pleasure.