It's mediocre at best. Literally like every other gacha RPG on mobile. They're just following the same boring formula. After the initial "welcome" time frame, getting legendaries is quite low. It's like they purposely make your chances lower. Since the game is still new'ish, it's also quite unbalanced in terms of quests, bosses, and characters. Currently almost through the last act in mythic. The only positive is that it's easy to level up your characters and promote. Fun for the first week.