I spent 3 days in Ariadna's appartment. It is very well situated, not too far from the city center by walking and 3 minutes by walking from Lavapies metro station. The studio is little but there is everything you need to spend some days in the city. Ariadna is very helpfull, she always answerd to every my question. Also during our stay she wanted to know if everything was ok. I didn't meet her, i have been welcomed by his friend, he has been very kind too, he offered us a glass of wine at our arrive. I suggest to chose ariadna's place to your stay in Madrid.