This apartment is in a very central location and is quite comfortable in most regards. If you're looking for a short stay in central Madrid, this is not a bad option as it is within walking distance to nearly all popular destinations. Despite being in the centre, the double glazed windows block out most (not all) of the noise.
However, I'd be aware that the communication with the host/manager was a big negative here.
- the day before we were due to check out the host/manager WhatsApped us with list of "checkout instructions" as well as a list of outrageously expensive charges if we failed to comply (e.g., €200 for leaving the key in the inside lock, €60 for leaving any food in the fridge or cupboards). When I asked for more bin bags (too few provided), the host/manager became defensive, hostile, and used gaslight-like tactics to try and convince us that these charges were a normal thing.
- nearly all communication was done on WhatsApp outside of the Airbnb platform - this is against Airbnb policy and I would recommend you don't play along with this even if the host/manager is doing so.
- the day before we checked in, the host called us on our personal numbers and asked us if we wanted to temporarily move apartments, meaning we would have to move again halfway through our stay. They seemed a little too pushy on this even though we said we were uncomfortable doing so.
- halfway through our stay the blinds above one of the beds fell off, and we were told we wouldn't get a repair until the day we checked out - this meant sleep became difficult.
I will stress that the apartment and the location were great, but the communication with the host/manager left us feeling not that great.