Thanks to Jean for share his place, everything was as described, the studio is perfect for people that are out most of the time. Jean was very kind to provide us with all the information we asked and more.
The street around Marcadet Poissonniers can be a little intimidating, avoid it at very late hours if you are nervous about see pimps and girls of the night, not a problem for me and my wife, cause we are from Mexico and we are used to them. Just stay near the Jules Joffrin station streets and you will be fine.
Both stations mentioned before are great for move to everywhere, really useful.
I totally could com back, thanks for everything Jean.