Even mature people can become addicted in this game. It is great fun! Very positive I rate the announcement after two hours of play, "if I wanted to have a coffee" or "they already play two hours,". "They already play four hours," but then took me quite frightened, but since then I play more than two hours at a time. The time always goes by very quickly, because time many beautiful objects has to do. One downer: There is no overview for companies that have been built. Furthermore one can ever lose track. Otherwise a great game.