Location! Location! Location! This place is perfectly located. It is right next to Plaza Mayor, walkable to the Royal Palace, and the botanical gardens. We walked to everything. It was a bit noisy at night because it was so centrally located.
Only negative of the place is that you have to go up 2 flights of stairs. There is an elevator but it is slow and goes between half floors. Therefore, you have to go up some steps if you use the elevator or not. We were travelling with a toddler and stroller so we had to carry it up and down the 2 flights of stairs multiple times a day
Overall, we were impressed with the location, cleanliness, and setup. It had a full kitchen and even a washing machine (no dryer, but there was an item to hang up clothes). We will try to come back to this apartment next time we travel to Madrid