This isn't a terrible game however the story is so incredibly and needlessly slow. Missions are extremely repetitive. Among the games out there that have a gacha system, I've never experienced one as sketchy as this one. Furthermore, similar to how other gacha games work, in order to be "good" you must get good servants. I've played on and off for about 5 years. I haven't paid a dime to the game and that's very apparent in my lack of good servants and rng. Which drop rates better.