The understated, gripping performances, the script and even the costumes!
What I didn't like
There were some opening night stumbles that did not distract from the power of the play.
My overall impression
A chilling, thoughtful examination the sinister past re-surfacing in the present, presented by two talented, grounded and, at times, heart breaking performers. There is also an unnerving sense of dread that haunts the entire performance. Good stuff!