I stayed 4 nights in Sofia's flat, and this flat was great to explore the centere city of the Paris. Most of all, compare the price, the location is really great. It is located at just in front of the Metro station, which takes only 10min from Gare du Nord. And to the Marais area, you can easily go by foot and it only tooks 15 mins. Sofia is one of the most friendly and rational host I ever met. She is very warm hearted person, for example, when I was in hurry for tour early in the morning, she borrow me the tumbler for coffee. She can also speaks fluent English so you don't have any problem for communicaiton (which is very important wheh you can't speak any french). The flat is bit small but very clean and neat. Sofia always prepared the bedding for every night like hotel, which was very impressed. Of course, there're some rules you have to keep in mind, like no shoes in flat, open the window after shower, and becuase it's space sharing not seperate room, so don't make much noise after 11.pm. Over all, I really appreciated the staying in sofia's flat and definately recommend this flat who want to explore the Paris!!