We stayed in Roberto's lovely apartment over Easter. It is in a great location in trendy Malasana. Lots of bars and restaurants, the apartment is minutes from several Metro stations which makes it very easy to get into central Madrid. The apartment had everything we needed and was light and airy. Roberto was a good host - easy to get hold of and left us with everything we needed - even a bottle of wine (thank you :)) The only slight downside is that we found the apartment noisy at night with people sitting outside the bars and restaurants until the morning. But if that doesn't bother you then we would highly recommend the apartment.