Mazda 6 problems?

Hello, after an evil (and above all expensive slip with a Ford Mondeo) I want to become a Mazda driver again. I would buy a Mazda 6 exclusive combination with 2.0-litre gasoline and automatic transmission. After all the trouble with the Ford I have become more careful and want to know if and what known problems there are with the Mazda 6. What should I pay attention to when buying? Thanks already alphazet