We had a great time in this lovely apartment. Easy 3 stop ride to get to the Puerta Del Sol station, right by Plaza Mayor and the Mercado San Miguel. Great spot if traveling with kiddos. Playgrounds in front of the building (4 of them!), supermarkets, ATM, and fruit vendors on the same block, Atocha station 5 minutes away and all the main sights very easily accessible. It took us less than 20 minutes to take 2 trains to Casa Del Campo zoo and park.
There is a music teacher on the first floor, so on weekdays you will hear lessons going on. Some street noise, which we noticed b/c we live in the woods, but very manageable. Clean and lovely apartment in a great location! We had a lovely and comfortable stay!