Unfortunately, there is also a minus, therefore only 4 stars:
According to the manual can be 1-5 cups (for 1 - 6 people) cook rice with it and keep warm. During this 1 - 4 cups works perfectly, the device comes with 5 cups to its limits. The water is boiling over and the finished rice fills the container up to the last centimeter. Thus, the recommended Tristar loosening of rice after cooking is almost impossible, because everything falls next. But does not loosen it on the rice, formed during the warming process rice clumps on the base of the pan.
I would therefore - if you want to cook for 6 or more people - to advise the next largest Tristar RK-6112 rice cooker.