In 2019 I used LOT on RZE-WAW-GVA-WAW-RZE route. Honestly I have no any complains. Nothing spectacular but also nothing to complain about. Made on time my connection so I was happy with that. But with overall opinion about LOT I do not plan to use them on trans-Atlantic flights. With my friends who used them on flights USA-Poland no one really was happy. Quick check on LOT flights on Flightradar24 clearly shows that they are almost always late! Not good! 4 stars for just my recent flights around Europe.