P2W rubbish.
Gave up after being stuck on the same levels for 2 weeks straight with nothing to do but log in and collect resources and do chores.
Some stages are purposely designed to be unfair to try and force spending. The free resources you are given isn't enough to progress and there's no way of earning more apart from logging in everyday to do chores until you reach the required power level to progress a couple of stages.
PvP matchmaking is bad, once you get so far it will just match you with opponents with far greater power so you know you've lost before you even start.
It has VIP and monetisation. Events are also P2W.
There's aot of stuff to upgrade and characters need a lot of dupes. They also have level caps that need to be unlocked by using dupes. This means once you reach the level cap you can't upgrade anymore until you either get lucky with summons, wait weeks to buy from the shop with in-game currency or opening the wallet.
Resources eventually dry up and summon rates for the best characters are poor.
If you like the IP and idle games you can get a week or two of gameplay out of it before you reach the paywalls.
In the end this is just another game for whales to try and compete to see who can waste the most cash on a mobile game.