It appears in evangelical circles that when people who are familiar with the NPP debate, they think of N.T. Wright almost indefinitely (not necessarily Dunn, Sanders, etc.). Even though I think N.T. Wright is wrong with his NPP in most recent scholarship, his work is very important to evangelical theology and the future perspectives that will emerge so we can defend the tenants of the gospel of grace.
Schreiner notes, "Paul never criticized anyone for the desire to keep God's law; rather, he found fault in the failure to keep it...He found them guilty before God because they failed to keep God's commands...any works in general are clearly in view, and they do not contribute to salvation, for otherwise grace is ruled out and human boasting is allowed" (p.527-528).