We had an amazing time in Madrid and it was partly because of this Airbnb. Guilherme was very nice and helpful, and he speaks great English too. He made us feel at home.
The apartment was perfect, it's really spacious, near the center, there's everything you need and it's not too noisy. The cats were a nice touch to top it off, they're both very cuddly :)
It really doesn't get much better than that for the price.