Info on Hostels in Krakow

I plan to travel to Poland next month and since my budget is limited, I am trying to find out more about some hostels in the places I plan to visit. The one that has remained is Krakow, so, if there is anyone who could recommend some good hostel there from personal experience, I would be very grateful.

Since I travel a lot, I am pretty much familiar with nice and affordable places all over Europe. I was in Krakow twice, and a few of my friends also went there on a holiday last summer, so, based on their and my own experience, I highly recommend the following hostels:
AQQ Hostel (absolutely perfect location - the center of the town),
Tutti Frutti Hostel (also, great location, but what’s even better is the interior), and
Mama’s Hostel.