I'm planning to visit Krakow, Warsaw and Gdansk this year, and I'm planning to travel to each city by train. As of now I'm planning to visit Krakow first, and then after my time in Krakow I'll take the train to Warsaw. And then after my time in Warsaw I'll take the train to Gdansk.
From what I've read and heard the Intercity Express Trains would be the best bet. I figure they're the most expensive, though they're the fastest (Krakow to Warsaw would be under 3 hours) and most comfortable of the trains. I'd like to hear everyone's thoughts on train travel in Poland, what everyone's experiences with the trains in Poland have been, and everyone's experiences with the Express Trains. Thanks!