Great location in the middle of Madrid. All major city highlights can be reached on foot.
One of the downsides is the noise. The garbage collectors show up every night between 23:30 and 0:50 and sometimes the pavement is cleaned with high pressure hoses in the middle of the night, too. Also Madrid is a party town, so there is always noise and/or sirens coming from the street. But the overall noise topic is probably true for most apartments in Madrid, as walls are thin, there is no triple glazing and garbage is always collected at night. An interesting learning for us was that you really don‘t find free parking spots in the inner city anywhere and paid parking over night is expensive. Again that counts for the whole inner city and is not specific to this apartment. Check-in was fine and Sergio/Elena are very helpful if you need them.