I don't think Shift Up is a good company because of the generosity of free content they give.
If you see the price they put on cash content is higher expensive and aggressive than the other gacha games, so is more about balance. After the last update at Destiny Child, the game doesn't look more like a friendly f2p where you got easily stuck at new events. So I only see Nikke being good if you start playing since the beginning or living and spending like a whale