According to a study published by the Annenberg Institute at Brown University,

The study, released in June, found that eighth-grade students in traditional public schools in North Carolina who transitioned to a charter high school had more positive behavioral outcomes than their peers who went on to a district high school.

The students who transitioned to a charter high school from a traditional public school were less likely to be chronically absent or suspended during their freshman year. In high school and beyond, these students were also less likely to be convicted of a crime, and once they reached voting age, they registered to vote and voted in local, state and federal elections at higher rates.

Opponents complain that, on average, charters performance on standardized tests is on par with districts.  But when it comes to parental satisfaction, civic outcomes, and other non-academic measures, North Carolina charter schools appear to have an edge.