This was ok. The action tried to be relentless and mostly achieved that. The acting was contained but nobody stood out. I couldn't understand the brogue or the brits when it counted so i may have missed key dialogue. Main character seemed too helpless and daft to be likeable. The trajectory really set him up to be killed so the escape seemed like a sell-out.
Being from Northern Ireland myself and growing up in 70s, I found this movie amazing. I did notice a couple of concontinuity errors, but all in all very accurate and shot brilliantly.