Here are sone good points about it:
The BOSS music·Most of the boss music are from famous japanese bands like Cool&Create
Lag:This game rarely lags.Even if you have such a bad internet,you can still play this game.
Storyline:Storyline is rather interesting.From a few people to people from sdm,human village and many more.
Gameplay:The game is too grindy.Its like FGO(Fate grand order)
Upgrades:In order to uograde to 5 stars,you may need to spend a whole week.Just like i said,it is very grindy.
This is a grindy game but the music and the storyline are rather good.The music is just the best.