Ok, The graphics, the gameplay, the mechanics, the the characters, the story, they are all outstanding. The game is pretty much f2p right now as they give out lots of quartz ( Gacha currency ) ingame. You can reroll as much as you want to get your 1 ssr character choice. And to mention this game had auto sweep unlike alchemy stars which would save you lots of time to farm.
The only downside of this game right now is how buggy it is. So much bug is presented in the game and it is getting annoying now. Maybe it's just that the game has only been released, but hopefully the devs work on this as soon as possible