We stayed at Krystyna's place with our 5-month old son. Krystyna was there to welcome us on arrival and the apartment had just about everything we needed, both for ourselves and for travelling with an infant. Being on the fourth floor without a lift was sometimes slightly challenging, but was certainly manageable. Although the apartment was very spacious, one thing we hadn't quite appreciated was just how open plan the space would be. There are no separate rooms at all (except the toilet), with the kitchen, living room, bed, bath, shower and cot all in the same space, which made it a bit difficult for as it meant we couldn't use the shower, turn many lights on or make much noise throughout the apartment once our son had gone to bed. Otherwise, the apartment is in a great location right next to the Metro station and in a very vibrant area with plenty of good places to eat, bakeries, supermarkets, etc. The apartment layout didn't work so well for our particular situation, but we still very much enjoyed our stay and would recommend to others looking for somewhere to stay near Bastille.