ArcheAge's robust free to play model, which is much fairer than many of its peers, will likely keep interest high and the population steady, which is an absolute necessity in a game that relies so heavily on its player-base to create meaningful experiences within its world. If you like some of the concepts of EVE Online or Darkfall but want a more relaxed approach then this is possibly the MMO you've been waiting for.
For now we will say that Always Sometimes Monsters is best described more as an interactive story rather than a video game. There simply isn't very much video game about it. Instead you try to guide your character forward during the strangest and often darkest point of their entire life.