We're a family of 5 and we were very happy with this apartment. It is incredibly well located, the rooms were comfortable, and the air conditioning much appreciated. Having two bathrooms with showers was great too.
As other reviews have noted, there is a subtle noise from the Metro, but it didn't bother us. The stairs to go down to two of the bedrooms is a fire-hall style winding one. It can be tough to navigate with a suitcase or for anyone who struggles with stairs. The kitchen is basic without a dishwasher and there is no laundry on site.
None of these were deal breakers for us - we would stay again.