On paper I can see the argument that there is little morally redemptive quality to a film like Dead Man's Shoes, no diamond polished by the end credits to reward an audience going through the trauma. But to actually sit through the film, and most importantly, to be subjected to another of Paddy Consadines' electric performances, is an extra-ordinarily vital, if viceral experience.
In 'A Room for Romeo Brass' Considines character shifted from comical to threatening in a truly unsettling way, although in the end his promise 'to go dark on you' is easily thwarted by the decisive action and confidence of a father-figure. In this film, again, there is some uncertainty on the audience's part as to how far the character will go, as until the end, we are uncertain of exactly what he is revenging.
Rest-assured, Considine delivers an absolutely convincing depiction of a man struggling to balance his desire for revenge and redemption, he invokes sympathy and fear from the audience in a performance to rival DeNiro in 'Taxi Driver'.
I judge a film on the value of the experience it gives you, and 'Dead Man's Shoes is more than worthy of your time.