I think the first act drags A LOT... Not much is happening there, motives are terribly explained, and what's the point of British accent? I wanted to leave during the intermission but finally decided to stay. The second act is 100 times better in terms of structure and dramatic tension, though nothing near perfection. I think it would work much better as a 90-minute play with no intermission. Would not recommend it to friends but indeed something worth (half) your time if you survives the first act.