I'd like to start with a warning: if you plan to arrive after 22.00, Henar charges €50, which you have to pay on the spot, in cash. To be fair, this is mentioned in the house rules, but it's easily overlooked. Henar mentioned the extra amount a few days before our arrival. Quite the unpleasant surprise. I asked her if we could do the check-in another way: if we could, for instance, pick up the keys someplace ourselves. That wasn't possible. We arrived at 23.00, an hour after official check-in time, and while I understand the inconvenience for the host, €50 seemed a very large amount for overlooking one of the check-in rules and being one hour late. It rather soured our arrival at the apartment.
After that, our stay at the apartment was fine. It's clean and well-located, Malasaña and Chueca are a 15 min-walk away and Henar allowed us to stay an hour or so after check-out time. If only she'd shown the same flexibility and hospitality during our arrival.