07-09-2007 - 20:25
I travelled on Swiss trains in July. They are fast, frequent and modern and, as far as I know, Interrailers require no reservations; so no 2 or 3 Euro reservatrion charges and you can hop on and off trains as you like.
To avoid: I'd say, from experience, night trains in Italy. These are generally much less safe than Western European night services. There have been many incidents of organised gangs systematically robbing the passengers before stopping the train and jumping off. This has been a problem on the overnight north to south services.
Have a great trip.