Nico’s place is in a perfect location in La Latina, about a 5-10 minute walk from Plaza Mayor and other central attractions along with plenty of tapas bars.
The apartment was incredibly quiet; we did not hear a single sound at night despite the location. We also felt very safe at night.
The apartment was clean and well appointed in terms of furniture, art, etc. It did not have much beyond glasses, silverware, and plates for daily living. It would be nice to have some paper towels, some coffee, and potentially a guidebook or welcome to add a personal touch. Overall, it is a great place to stay while in Madrid.