I have been to those aprtments many times and really liked it at the begining however I have the inpression that they stopped carrying. Many things remain unfixed- curtains (that dont really cover from the day light at 5am), blinking light, cork in the bathroom sink, missing glasses. They also stopped providing coffee capsules for the coffee machine. Once I got an aprtment without any blinds in the windows and super dirty.
I think for that kind of money, Krakow offers many other opportunities.