Tl;dr typical p2w idle game, ok for casuals. There are better games if you want to whale on. Game progression requires you to obtain multiple copies of the same char from gacha, besides the in game mats needed. So you spend a good amount of time stuck in mid game, with nothing to do, either at 160 cap or 180. Events are literally copy and paste from the previous formats and reskinned. Pvp is where you can get some free ssrs after a couple of days, good luck trying to rank the whales.