Sayit are so much better than usit its unreal.
I pulled out of the usit deal cos yerwan was charging €646 for flights only, that I had to book with them to qualify for the J1.
With Sayit, I just have to pay the Sevis and Embassy Fee of €135, which I would have to pay to Usit aswell later, and I can book my own flights seperately. Or I can also book through Sayit if i want to, yerwan there quoted €460 for Boston Flights.
Go with Sayit...