Fun but, lag is crazy, about 5 to 10 seconds at times. The cash shop is very intrusive and necessary to progress (resource cost is very high) with premium characters only obtainable and upgradable with a lot of cash. It is purely P2W as usual for mobile games. Eg. For a hero to reach max level you need over $1k. There is no balance and certain things match players vs players several magnitudes stronger, meaning you can get wiped out with one attack.