Donīt know if the Warsaw based pilots have the exact same deal as the Norwegian pilots, but according to one Polish captain I spoke to briefly, he now makes about 30% more than he did with Centralwings or LOT. The roster is more stable as well, with 5-3-5-4.
Upgrade is, of course, normally according to seniority, but minimum is either 4000h (2000 on B737) or 5000 (1000 on B737) for upgrade.
Since there is a third a/c on the way to be based at WAW, I suppose theyīll need more pilots, but donīt take my word for it. Norwegian has a huuuge stack of applications awaiting processing...