We felt very welcome at this place. Booking and communicating with Meli was fast and pleasant. We had a chance to meet Meli in person upon check-out and she was very friendly and attentive.
There are good and not so good things I could list.
Starting from good - the description of apartment is accurate, it looks just like on the photos. There is tunable heating and enough of warm water (gas heater). The apartment was clean and had everything necessary. We were offered pick up from the airport and it was very convenient. Location is nice, not so central, but everything is walkable distance. 450m away at the Puerta de Toledo you can find good breakfast place (left to the hotel entrance). Right next to the accommodation is also lovely small bar/cafe. Supermarket we found 7 min away uphill in front if Basilica. Metro is close, bus C2 is 50m away, suburb trains are 900m away. From the immediate attractions I highly recommend to visit Basilica - it's magnificent but somehow overlooked by tourists.

Not so good thing about the place is noise. Host said that in the future they will put sound isolation, but at the moment every single activity from the outside corridor is heard. Doors being opened and closed make loud sounds, and bedroom is placed right behind the wall to that corridor. Walls are paper thin, and you can barely avoid hearing every neighbour going in and out, any time of day. The next door apartment noises also heard way too well, so that we had illusion it's in our apartment somebody is talking or washing dishes. I recommend you to use earplugs, because otherwise it's hard to fall asleep, and if somebody returns at night you can wake up easily.

All in all, this place is good for people with good deep sleep. I can recommend Meli as good host and confirm that place is well maintained.