I'm to arrive at Warsaw airport October 28. Onwards to Poznan by train. I will stay in Poland for more than four months, almost the whole winter, so I have to take lots of cloths and daily stuff.
I have a 28-inch suitcase about 29 * 52 * 78 cm, which is under airline check-in luggage limits. But basically a train trip doesn't supply check-in luggage service, so I must take care of my suitcase myself. I'm afraid the overhead racks and space under the seats can not take a suitcase of this size.
The PKP website says that oversize luggage should be charged an extra PLN 5.10 fee, but it doesn't specify what is oversize. In China's high speed train I can put large luggage in the shelves at the end of carriage or even in the aisle beside me, but it's my first time to Poland so I don't understand the train there.
Also, I found that there are IC, EIC and TLK trains between Warsaw and Poznan. The speed is similar but TLK has a lower price, so is there anything different among these trains, especially the service and inner facility?