Can't think of a more central place to stay in Madrid. Literally on the Plaza Mayor, a couple of minutes away from Puerta del Sol and a ton of restaurants/bars/stores etc.
The appartment is big, beautiful, and modern. It's exactly as pictured, and you can't beat the view of the square from the living room balcony! We were pleasantly surprised by how well the windows block out the noise though.
The appartment is on the 4th floor, so if you have any mobility issues, keep that in mind. Otherwise it's a good workout!
Having a steam room was also great, felt like staying at a spa :)
Andrea and company responded quickly to any questions, and gave us great recommendations nearby.
Don't hesitate to book this place if you want to stay in central Madrid!