I don't get how this game doesn't have 5 stars instead of 4. I mean, the problem is with those inattentive, or, not to be rude, dim-witted parents that don't look twice at the payment system. I don't think you will just throw them your credit card and leave the room, right? Even if they tried to "save" your credit card information, if they made multiple purchases in a row, they will be stopped and disabled from paying anymore. Afterwards, the credit card information will be cleared. I haven't played the game for a while, but it (maybe) has a little popup note asking if you want to set up a parental control system.
Anyways, the game is very good and well worth the price, even though non-paying players get less than about 10% of the entire gaming experience. No true gore and violence was in this game, although some of the magical spells have to do with weapons that can inflict a wound but didn't. There are some mild but never bad words, such as "pathetic" and "fool".