The location is so central, yet so quiet (and we were there on New Years Eve). The terrace is lovely but take care on the spiral staircase. There were four of us in the apartment and it felt that we had sufficient room for all of us. Kitchen is well equipped - we made a couple of evening meals and had everything we needed. Just be aware that a pot of water takes ages to boil on the hob! I can’t stress enough how central this is - we walked everywhere- Palacio Real, Retiro Park, the Prado. It’s a nice space to use as a base for exploring Madrid.