The flat is in a great location in Le Marais, close to a metro stop, with numerous shops and restaurants near by. Close to all the action in a safe neighborhood. Within walking distance to all the big monuments and museums. The flat has a big living room with a big sofa, where you can relax and a cozy bedroom. The kitchen area is spacious, modern and has what you need. Shower was spacious with enough hot water and good water pressure. Also plenty of mirrors to see how you look before a night on the town. The flat gets great light and the large windows offer a nice view. Plus the place has an elevator! A rarity in Paris.
The downside is that it can get a little noisy from the street noise. After a while though you get used to it and it blends into the background. There isn't much closet space to hang things but I am sure that can be fixed by the hosts. Also the toilet in a closet with the washing machine may not be for everyone, but its OK.
Overall
The hosts are very responsive to any messages and friendly.
My stay there was very comfortable, great and enjoyable. I recommend highly.