Karmens place was absolutely wonderful! We only stayed here 1 night however it was within close walking distance to the metro as well as other places of interest (Palacio Real, Puerta del Sol, etc) which made it perfect for our short stay in Madrid. There aren’t any windows and it is quite small, however for only 2 people for a short time it was quite comfortable. A great place to crash after a long day of traveling, and well worth the price!