It’s a very central private apartment. 2-minute walk from plaza mayor, 5-min walk from Puerta del Sol, which is very convenient for city touring. It’s clean, has a fair size and a very quiet neighborhood.
The main downside would be the limited hot water for shower, the heater has quite small capacity, there might not be enough hot water if you take shower more than ~15min, and the you need to wait more than an hour for the hot water to be availed again.
There is a roof window right on top of one of the bed and it has no curtain. So if you’re sensitive to sunlight, it’s very likely you’ll have to wake up early.