An unbeatable location!!!
I am a single mom traveling with my two kids (4yo & 11yo) and my elderly Mother,, and this location provided us with enough beds for everyone and an ideal place for us, not to mention supersafe.
About the apartment: It was spacious enough,, and even though it was right in Calle Atocha, it was not noisy. The beds were very comfortable; the bathroom had a towel warmer that was a hit with my kids( I promised warm towels after every shower,, and they loved it!). the kitchen has everything that you might need (including a rather large refrigerator)
There is no need to travel with a hairdryer since the one at the apartment is fantastic. Another lifesaver was the washer (no dryer,, which is common in Spain). I learned that when traveling with kids having a washer available will help you pack lighter.
Location: It was close to everything from the touristic points of interest ( geet out of the building make a left and walk few steps and you will find the metro station (Anton Martin) , make a right and walk 8-10 minutes and you will find the Plaza Mayor.) to more practicals establishments like supermarkets, bakeries, luggage storage locations, banks and a burger king!. Ah! and a Gelatteria located right across of the building open until 11pm!
Communication with the team was easy and quick and they were very willing to help us in anything that we needed.