(But don't check out the subteranean hellhole beneath the pks station nearby.)
I once point blank refused to pay for the toilet in one PKS station on the grounds that it was diabolical.
Meanwhile, I know of a PKS station that was actually used as a toilet. The station shut down, but they reopened the waiting room as a waiting room during daylight. It then became a toilet.
Still, worst one that I've seen was in Krzyż Wlkp. station - just some standalone shack at the end of the platform, complete with evil toilet attendant and paper towels laid out on a table. I wonder if it's still there?