After about a week of play I can say that AFK Arena is not Free to Play friendly. Every time you complete a chapter we're offered a discounted bundle thats really not worth the $ they're asking for. And with such a limited number of hero's you can only progress so far before you need to ascend their level cap to handle the more difficult enemies. Which is only possible through summoning, this game is nice aesthetically but the micro-transactions hamper the overall fun factor after 2 or 3 days.