I stayed 3 days at Martas' place. Upfront summary: I love the place, even told her I want to buy her apartment if she ever decides to sell. Says enough I guess. The communication with Marta was quick, easy going and pragmatic. The apartment has a great terrace with table & chairs bit also a lounge corner and automated shields against the sun. The interior is tasteful and has everything you need. She usually lives there herself (personal stuff is very limited but gives a personal touch charm to apartment). Kitchen is complete and functional. The bedroom with walk-by bath / shower is situated at backside so also no overheating by Madrid's hot weather. The living room / open kitchen with bank and table to sit at are just right size that perfectly fits the apartment. The apartment is conveniently located to shops, supermarkets and couple of squares with lots of restaurants and cafes but no noise from there that would disturb. In 3-4 minutes easy walking you are on Plaza Mayor and within 10 minutes at Retiro park. Will come back for sure, perfect for single travellers or couples!