We thoroughly enjoyed our stay at Belinda's place. The location is perfect: opposite the Atocha train station and only five minutes away from the Sofia (and the fab cafe/bar/restaurant NuBel).
This is also one of the most stylish and quirky places I have stayed with lots of funky decorative touches!
We mostly slept and showered in the place because Madrid is so exciting but the beds were extremely comfy and the shower was gorgeous.
Belinda was superfast at responding to messages, even my random questions about whether Madrid bars have strict footwear policies!