I'd say the best thing about the appartment is that is it at a great location. Metro is close by, you can easily walk to many tourist locations and the environment is full of nice bars, restaurants and cafes. The apartment itself is fine, with a nice kitchen en two good bathrooms. More windows would be nice, but you are in Madrid, you should not spend too much time at the appartment any way. The host was easy to communicate with and everything went by without any issues. All in all, very decent apartment which I would recommend.