For youngster who's toilet reading is the wall street journal. If you want a Real business game, this is the one.
This simulation is perfect. Every business school should use it for teaching what you should and shouldn't do in business. The interface may be imposing but after a while you get around it. What is a little bit more complex to figure is how to make your business profitable. You might go through one or two false start and experiment before keeping up with the AI controled company.
There are a lot of variable that influence the well being of your product and your profitability. You can use different source of raw material, decide if you use your opponent's raw material or the oversea's one even if it is more expensive. Should you keep on your price structure and hope that your opponent cheaper price will drown him or should you use the power of your vertical structure and drop your prices below profitability until your opponent decides he can keep up with you. Those are only a couple of exemple of the multitude decisions you can make.
But what a thrill it is to setup a complete vertical product line from raw material to your wonderful car. As far as I'm concerned, this is as close as you can get of being Donald Trump without having your own show on television....