I had the pleasure of participating in Bella's Comet that used ARC:Doom and it has quickly hit the top of my list in terms of systems to play. While it is easy to pick up and learn as a player, it packs a punch in terms of play. The book is stunning, well-put-together, and easy to read. The gameplay is simple to pick up, but as I stated, packs a punch in terms of actual play.
The real game timer adds a welcome stress that adds something fresh to the tabletop game scene. You don't have time to figure out the most perfect plan to face the bbeg. Instead, you just pray you've got it right as you confront omens and race against the apocalypse.
Top Tier system and game, I cannot wait to play this more