Great place in the heart of Madrid with awesome views and in walking distance to the famous sites. Lots of bars and restaurants around the place making it super convenient to go out. It wasn't a problem for us and we were expecting it but it does get loud at night.
Meyling was was super flexible and accommodated our last minute change in plans but there are slightly stricter check-in/out timings (extra pay for super late check-ins to arrange for the assistant) as she lives in a different part of the world. The place is a bit small for more than 2 adults but easily manageable. You will have to rearrange the room to completely extend the sofa bed.
Overall super happy with the experience and would definitely go back if I am in Madrid again.