Nati's place is ok, the apartment as described has wi-fi and a fully equipped kitchen, a not so big but comfortable double bed and a bathroom with shower... is situated at the third floor (no lift) of a nice and well kept building very close to the "puerta de toledo" metro station. We took little more than 1H to get there from Madrid airport because few changes were necessary with the metro or public transports (a taxi fare was about 30euro pp) and unfortunately our host wasn't able to give us details asked about transports before arrive...
Actually overall communication (and welcoming too) was just like "basic" and not very warm... but it didn't stop us to have great time in Madrid and enjoy the "pueblo madrileno" warmth during our visit.
There was some refurbishment works in an another apartment in the building during our stay as well, that means woke up every morning with hammer noises alarm clock, it's ok, we just wanted to wake up quite early, but I think it's one of those things to be informed of by an host before booking or at least before arriving.