Mark’s place is a gem and he’s a great host too! He was super flexible with our check in time, kept in contact throughout our stay to guarantee we had anything we needed and were comfortable. His place is fabulous, you’ll find everything you need there and more, it’s walking distance to Madrid’s main sightseeings, lots of bars/restaurants/shops around and multiple train stations nearby. I highly recommend it and will definitely be back next time I’m in Madrid.