The Yogourmet holds the yogurt at the perfect incubation temperature in a water bath until it's the thickness you like. The longer you incubate the thicker and tangier the yogurt will be. There's a recipe booklet that comes with it that explains the whole process and tons of web pages too for you to reference as well as my page. I got mine on Amazon for about $50, at that price it will pay for itself in no time. (I have no financial interest in this product. I'm just telling you what works for me.)
The best yogurt making tip I ever got was not to use too much starter. One or two tablespoons of starter yogurt per batch is all you need. If you use too much you probably won't have enough milk for the good stuff to eat up and your yogurt will be runny/soupy instead of thick. Let me know if you make yogurt at home and what works for you.
Until next time,