Hi Judy! Welcome to our
ALL SPAIN Message Board!
You've definitely come to the right place, indeed, as all of the Madrid hostels you list have been pretty well reviewed here in this forum. The answers you seek are at your fingertips.
I'm not sure if anyone has stayed in these Madrid places recently and hasn't yet put up their feedback, but you can find (sometimes dozens of) reviews of them by clicking on the handy SEARCH link above/right and typing, for example, MADRID LOPEZ or MADRID MARTIN or MADRID HISPANO ARGENTINO to find those previous postings.
I stayed at
Hostal Cervelo , the "sister hostel" of Hostal Martín. You can find my review of this place from last April or May I think.
You say you're "moving on" after 2 days in Madrid. Are you "moving on to other places in Spain? Feel free to ask us about those too as this is, afterall, an ALL SPAIN Message Board (and not just about Madrid). We're here to help!
Good luck and have a wonderful time in Madrid and throughout Spain!
Saludos, MadridMan