Recently, there was a great breakdown of the classes available on the trains, but I still don't know which ones are worth the cost. I have bought the first class tickets before, and found that to be good service, but others might want to know which class is the most economical and which offers the best bang for their buck. So, does anyone have experience with this? Can anyone give a review of what is worth it? I am sure this depends a lot on the line, itself, since they all differ broadly.