This is a great place to stay if your expectations are correct. The flat is exactly as advertised, one room, large and airy, clean but not luxurious. Access is up one flight of a spiral staircase. Look for the light switch just inside the stairwell door.
One thing we liked is that everything is convenient. Supermarket, phone store, laundromat, restaurant, Metro and bus stops are all within one block. It's an interesting, vibrant working class neighborhood, good for cultural interaction.
The best thing about this flat though is Jerome himself. He is well informed, fluent in 3 languages, and eager to help. Your own personal instructor on access to the city. Jerome is better than advertised; we would stay here again.