The actual combat was okay. Getting to rank diamond 5 is doable as F2P, but getting much higher is near impossible without a massive grind over a long time. Upgrading card levels is essential, so when it comes to PvP, the person who played the longest or payed more will win. There's no counter play against the stat differences. Also, the game constantly crashes for no reason. Also, the prices for anything is ridiculously expensive for very little value.