Henryk's place is AMAZING. Very clean and well equipped. Its a lovely location, around supermarkets, good restaurants and very family freindly. We stayed for 6days and had a smooth stay. Reina Sofia museum (Picasso works) is a 7 minute walk, Sol is 10 minutes and Retiro park is about 15 minutes.
Communication with Henryk and his friend was very quick and effective.
I highly recommend this place.