50DMW was enjoyable on some fronts, especially Kingsley's acting and some great moments in the script, but I just couldn't buy Sturgess as Martin. He never made me feel for him one way or the other, I saw no real motivation for selling his friends out, and he just didn't seem at all believable.
Skogland's directing is solid, as is the script for the most part, but the occasionally brutal violence and tortures left me disliking both sides of the conflict equally. If Sturgess had been more sympathetic this film would have worked so much better for me. But maybe that's the point: he was what he was, neither good nor bad (or very bad, if you're pro-IRA).
I don't know enough about the "Troubles" to say who's right or wrong. My heart tends to side with home rule, but when one looks at all the innocent people dead on both sides it adds up to nobody being right. This movie could have made me feel so much more but Sturgess just seems on the fence in every way throughout, and by the end I was happy to see it all end, leaving me feeling that nothing had really been accomplished but more pain and death, despite the claim he saved 50 lives.
He sure didn't come off as much of a hero here, and ultimately all the violence just felt pointless. The film raises many questions and answers none, which may be the point. But I didn't feel like I learned much, or enjoyed it much, and without one or the other I can't say I loved any film, no matter how competent it may be. I did enjoy some of the supporting acting a fair bit, in any case, and Kingsley is excellent as always.