WEST SPRINGFIELD – Eugene O’Neill is one of the most important American playwrights of the 20th century, but his intense, thought-provoking dramas are not performed as often as they should be. Hartford Stage produced his only comedy, “Ah, Wilderness,” a few seasons ago, but O’Neill is not often seen on theater stages in our area. So it comes as a surprise that O’Neill’s last play, “A Moon for the Misbegotten,” was staged at The Majestic, a small neighborhood theater troupe that skews toward comedies, musicals and light dramas.

So, to be honest, I went into “A Month for Mistakes” with some trepidation. But when I first looked at Greg Trochlil’s extraordinary set, a dilapidated Connecticut farmhouse nestled next to a large tree, I realized this production would be different. It has two blockbuster performances: Jay Sefton, fresh off “Unreconciled” and three Berkie nominations, and Sue Dziura; good supporting cast; Solid direction by James Warwick; and the excellent costumes and lighting by Dawn McKay and James McNamara, respectively.