Highly recommended. I spent a week at Irene's place and she was a welcoming and attentive host. The place is stylish, cosy, and clean. It is very conveniently located, just a few stops from the center and the university campus. Easily accessible when coming by metro from the airport as well. I personally liked going out in the neighborhood (Ríos Rosas/Chamberí) which is less touristy than some of the inner district but offers plenty of great options.