on the positive side :
very well located Malasaña is an amazing neighborhood, and very clean (recently renovated flat)
on the negative side :
internet is not working well especially from the room which was a big pb a we were working from the flat
there was a loud ventilation machine that you could hear from the bedroom and therefore you couldn't sleep very well
overall a bit "cold", it feels a bit like a hospital room, would be so much nicer with a little bit more decoration