We've been to Italy now 3 times and are returning in March of next year. We used the trains during 1 trip but had Euro rail passes since we were traveling by train all over Europe.
In March we are planning to buy Italia Rail Passes before we go to Rome in March. We'll probably only travel by rail from Rome to Pompeii and probably Rome to Pisa.
For such limited and short trips is it really worth the 1st class cost? What is the main differences between 1st and 2nd class here?