This was my first AirBnB experience. I showed up mid-morning on a Sunday. Elena and her friend Tata showed up within 5 minutes of my arrival and made sure my room was perfectly ready for me. A slight issue the day before led to her putting me in her best room and effusively ensuring my comfort level was okay. This really is a great, great host.
The front room is awesome, but Madrid is loud at night, and just as the crowd quiets down, the garbage trucks show up at 1 a.m.. Ear plugs made a huge difference on night 2. Bed and pillows were very comfortable, and the place was immaculately clean. I stayed in 6 hotels since leaving Elena's on this 2 week trip and prefer her place to all of the hotels.
Not sure if there is air conditioning for the heat of the summer, so ask first.
Overall, an awesome first experience.