We had a great time at Sébastien’s apartment. The place was easy to find, and we were let in promptly and given a lovely welcome and all the information we might need for our stay. The apartment was exactly like the photos, immaculately clean and had all the basics we might need including hair dryer, washing powder, shower gel, and things like cooking oil, salt and pepper. We were very happy that there was a coffee machine too! Both the double bed and the sofa bed were comfortable and it was great to have a good-sized dining table for breakfasts and the occasional evening meal. In terms of layout, just for information (as it might be hard to see from the photos), the shower is downstairs, leading off from the bedroom in the basement, and the toilet is separate from this, upstairs, next to the the dining area. The only con about the apartment has been mentioned by others, and that is that it's not very soundproof. We were aware of this and took earplugs! One other thing to mention is that the windows open directly onto street, so you won't have much privacy if you want them open! The glass is opaque however so there is no problem at all with privacy when they are closed.
Thank you Sébastien for a lovely time in Paris!