We connected at a cafe a block away where a very nice person (not Juan) took us to the apartment. Location is excellent, everything as advertised, second floor with elevator. Very close to Madrid main street, very close to Chueca and short walking distance from Puerta del Sol. Communication with Juan was very good, and although we never personally met him, he made sure we were taken care of.
Fridge, TV, wifi, two sets of keys, everything in perfect working order. Highly recommended.