The Apartment itself is located beside Plaza Mayor which of course is a very central place to be in Madrid. You will however need to climb endless flights of stairs in the old building as there is no elevator. They are endless.
The internal apartment door to the building has an electrical module on the back that when a code is entered on the front, it should open the door. When the electrically taped module stays on. Otherwise, you'll be outside the door and the module will be humming away on the floor on the otherside while you're stranded in a stone stairwell. Enjoy that one. We didn't.
There was no cleaning service, which isn't the end of the world. The decor was lovely and and view of the plaza pleasant.
However, the host attempted to charge 517 EUR for a flimsy thin plastic mirror light that broke and a coffee spill from leftovers in a mug. In addition to this, they attempted to amplify the situation by taking pictures of bin bags we filled (Surely cleaning waste up is a good thing?) and a dodgy toaster that was already in poor condition upon arrival and then sending a picture of a more expensive toaster that they were looking for me to cover as a replacement. We didn't even use it.
I'd have accepted a reasonable replacement cost for the damage but the amplified cost was unfair and left us all feeling taken advantage of. I made a contribution of over 200 EUR to settle up but I won't be staying here again.