Mixed, just like in France (or Austria). Cohabitation happened before under Wałęsa, which was constant conflict but as I remember it, more theatrics than real blockade of the government from the President's side. It also happened under Kwaśniewski, who focussed on appearing statesmanlike, though maybe he vetoed some stuff (I don't remember any details anymore).

_{*Lunatic*, n.
One whose delusions are out of fashion.}