The apartment is nice but small - it is good for comfort living of one or maximum two people. It is well located from transportation perspective: there are two metro stations in less than 5 min walk. It is not close to the main tourist attractions but it's only 15 min by metro to get to Sol. The neighborhood is quite nice as well: there are many shops and restaurants near by. The apartment is well equipped as well - there is a dishwasher, a washing machine, a microwave oven etc. in there.
I spent in the apartment 4 weeks, and I only had two things that bothered me a bit: there is no acoustic isolation hence you can hear everything what happens next door or in the hallway: people talking, or the music they are listening; all the windows looking into inner courtyard so the only view you'll have will be a brick wall or other apartments windows (which is quite ok for Spain though).