The story is great, the characters are great and the world-building is even better. Building your characters is challenging but fun and very diverse. The game mechanics and events are really fun to play, especially the 4.5 alchemy event. I do have some problems with the game, such as battery draining and storage, and also with how unfriendly it is for F2P-players. If a new 5-star character gets released most can only get it if they get incredibly lucky, because there aren't usually a lot of primogems or other rewards available once you've finished all the story quests. I've been playing this game since it came out and not only am I struggling to properly build the characters I do have, I also dont have much luck with getting characters I really want.