The stay at Sebastien was very uncomplicated. The check-in was very easy and the room was prepared nicely. I was in room number 2. It was a pleasant experience. It is a no-frills place but therefore the price is very reasonable.
The place is situated in the north. There is a bus that brings you directly to all the nice places in the city center. And there is also a tube station very close. In terms of infrastructure it is great. There is everything you need restaurants, shops, bakeries and so on.
The neighborhood is not the prettiest and cleanest. But therefore the price is not as high as in the city center. And you are close to the nice area at Sacré Coeur.
So for anyone who is on a budget but still wants to experience Paris this is a great option.