The concept behind the game is very good, however they do charge for credits, which is virtual money on the game, however the game can be played without credits, so that makes it all okay, or does it? Many people sign up to the site and start playing the game right away. They then find out all the stuff they can make with credits, and therefore buy some, or ask there parents. Usually there parents would say no, and therefore cause problems in family's. Secondly, people can spend often hundreds of pounds on this game, and the people who make it know it, so that's why they continue to put the prices up. Beware, they addict you and waste your money!