The flat is great. It is in a fabulous location with many very good restaurants and shopping just outside the door. It's a short walk to Colon and Retiro park along Serrano.
The flat has everything you need with a very comfortable bed and couch. The bathroom and shower are great with hot water and very clean. The kitchen is small but perfect for simple or small meals. The washing machine is also great to have on longer stays.
The flat does not have much of a view. It is interior to the building but the windows do bring in a lot of light. Also being interior keeps the sun from shining directly into the flat keeping it a bit cooler in the hot summer days.