The flat is recommendable for a single person or a couple in a businesses or tourism trip. The first option was my case and I had a good experience with. The flat is on the last floor (7th) with lift, which was perfectly convenient for me. Small (one peace) but very functional. Nice view from the top roof buildings of Paris (good light). I need to say that the flat was very clean on my arrival, which is a big plus. The flat, although very quite, can make you listen some small noise from lift or neighbors passing outside, which didn't disturb me at all. Alex was very reactive and gave me help always when I needed (thanks Alex!). The flat is about 20 min far (walk) from Montmartre, and around 5 min far from the nearest metro station (Simplon). The neighborhood should be the most popular from Paris "intra-muros", very cheap, real people around (no tourists), and have all the facilities open until late of evening. I recommend it and I would come back.