I bought the Interrail Global Pass 1st class adult for 15 days. 31.07 to 14.08.
I bought it from the SBB offices in HB Bern.
My idea was to “go down the Balkans” from Bern, cross to Italy and return to Bern.
Unfortunately I have to do most of the trip buy bus, and had to buy a plane ticket from Montenegro to Poland and from there take the train. I am quite disappointed to be honest since I had to return before expected and also just visited half of the cities I wanted.