However, I wonder how the WTF?! guys could speculate, whether he was in limbo or not.

He doesn't use his own talisman, but his wife's, when he remembers his children, the scene is the same, as when he finally arrives at home. The guy telling Leo that he should understand better than everybody else how it is to want to wake up.

All that said, I loved the film!
Best film of the year, even better than The Expendables!

"The first thing Fascists usually try to do is silencing the opposition."