Valeria is a great communicator and was flexible with respect to our check out. Check-in was also very easy as the key could be collected from security, who were friendly. The apartment is comfortable and light and has a balcony and nice views (you can glimpse the river). The bed was very comfortable and the shower was excellent. The location is also great, being on a lovely leafy street with cafes and bars nearby, and is also convenient to Retiro train and bus stations.