My experience is that their food is high quality and they do cook it hot enough. The only thing that is not cooked of course is the sushi and sashimi (sp). If you are not used to raw fish, some people might get sick or they could have gotten ahold of a bad piece although it is not really that likely. All sushi grade fish is inspected closely several times.
If you are worried, just don't eat the sushi or any raw products.