Real kudos goes to Molly Parker, searing as a heroin-addicted mother immobilized by the death of her husband, and to a poised little boy named Harry Eden, who's astonishingly good as the 10-year-old son desperately trying to hold her to the straight and narrow.
Pure belongs to Eden, a remarkably strong child actor, and Deadwood's Molly Parker, broken and affecting as his sweaty, gear-crazy mum.
It's not without one or two missteps, but remains likely the most impressive juvenile acting you'll see this year.
The film belongs to Eden, who creates a winning personality out of a combination of vulnerability, resourcefulness, toughness and fragility. It's an outstanding juvenile performance.
Nathan RabinThe A.V. Club
Pure loses a bit of its nerve in the home stretch, but Eden's unforgettable performance alone makes it a compelling portrait of a smart young boy forced to grow up way too fast.
J.R. JonesChicago Reader
A small but achingly authentic piece of kitchen-sink realism, this might never have made it across the pond without babe du jour Keira Knightley, excellent in a supporting role as a smacked-out waitress. But the real wonder is Parker, whose vulnerability and wraithlike beauty are devastating.