With realistic I mean that the film seems to be very credible by both the sequence of events here and in detail. In particular, the effects in multiple "steep retreat" can sympathize a good idea of what the commandos had to go through.
Mark Wahlberg was in my opinion the best candidate for the role of Marcus Luttrell.
The soundtrack contributes much to the drama accompanied the events that lead to the fatal end, very good.
Lone Survivor I have already seen several times and it will not be my last. For those to whom Act of Valor liked this film is likely to be just right.