We stayed at Helena's place for 7 nights with a 5 months old baby. The apartment is very big ,comfortable and clean. Helena made sure we have everything we need (she even arranged a bassinet and other things for the baby). It's also in a PERFECT location to explore the city. The communication with Helena was great - she was super welcoming and answered any question we had. The only downside was that the AC in the living room wasn't working very well and it was very hot in Madrid the week we spent there, so it was a bit uncomfortable, but I'm sure it can be fixed easily.