What is it like to be onsite? How was your journey?

Hey ! Can you share your onsite journey? How you got the opportunity, how much time it took for all paperwork and actually going. I am very much interested on salary structure. How much you made offshore, then what was revised. How much you get onsite, how much you could actually save? I heard we get 2 salary one of india and one of onsite, is it true? What are the myths or ground reality of onsite? Share everything!