These threads will help you familiarize with the service that LOT offers on their transatlantic flights:
http://www.flyertalk.com/forum/miles...arsaw-jfk.html
http://www.flyertalk.com/forum/miles...lot-agent.html
http://www.flyertalk.com/forum/miles...-enhances.html (info about LOT's product on European flights)

Two points to remember:
1) there is no IFE on LOT's economy intercontinental product; and
2) alcoholic beverages cost in economy class on LOT's intercontinental product; on European flights, alcoholic drinks are free.

Warsaw-Odessa flight is nothing special to report about. On this flight, you will get a small snack with full bar service.

Bon voyage!