Well, i understand the scepticism that everyone is going through because of this not being a known method of unlocking all around. But the thing is Sprint is keeping hush-hush about this whole unlocking thing. Only a few people in the know-how get their phones unlocked and also that is why i am getting such a good rate.
If you can check out Sprintforums, you can see a well-documented experience of a guy who is using his 4s for the past 3 months in Afghanistan. He had bought the phone on the launch day itself and got the unlocked piece that were being sold before 11/11/11.
Anywho, i will be getting my piece within 10 days and will post screenshots of it working on Indian networks flawlessly. I guesss that will put your minds at ease.