A normal hostel. There is a parking lot. We traveled with a company to Europe, and stopped 2 times, on the way there and back. Everyone in the hostel knows Russian, because half of the staff is from Ukraine.
There is a kitchen where you can cook.
The hostel does not provide only dishes, pans, pots, neighbors borrowed it)
It's my first time in Warsaw, so it's hard for me to judge, but I would like to advise for people from the CIS. The staff is Russian-speaking, responsive and friendly. Overall it is clean and tidy, and the most important thing is the price. 330zl in 10 days seems to be normal.