I've tried other bubble pop games and they seemed to just want money. In this one, the piggybank takes a while to fill and there's not a limit on how much can be put in before breaking it. The game itself can be a challenge. There are a variety of obstacles, and skill is needed to get the best advantage. Choose your bubbles carefully. There are ads, but not too many. The cost for special skills, to me, seem a bit high. There's no break for getting 9. Stick w/ the 3 pack.