What it does is allow you to make ice cream in just three minutes. All you need is ice, water, salt and flavoring and you're set. Using a scientific method, once you add your ingredients you simply shake it for three minutes, which is perfect if you have kids or just want to have some fun.
One thing to note is that it calls for cream in the ads but in order to get the ice cream right you will want to use heavy cream, not simply regular cream. You do end up with a small amount of soft serve ice cream, which is exactly how I like mine.
If you're looking for a long-term ice cream maker, this isn't it. This is simply a fun way of making a very small amount. It does work and it is fun but those that want something more may want to look for another alternative.