I chose this yogurt maker after doing some research on various models. This model has glass jars rather than plastic, and has the availability for purchasing a second set of jars so that you can make a new batch prior to when the other batch has been completely eaten. I also chose it because it has a timer that will shut it off after a certain time, since many models only beep when done but continue to stay on, which means you need to be available to turn it off.
Do be sure to follow directions carefully. It recommends heating the milk even if it is pasteurized, but you need to be sure to cool it completely to room temperature prior to adding yogurt starter. I learned the hard way that if you don't do the cooling, it will create a curdled mess. When I follow the directions :), it turns out perfect. I have made both plain and vanilla, and have used either a store-bought plain yogurt as a starter, or else have used some of the previous batch to start a new batch. Powdered starter is available, but it seemed pricey given it works well the other way.
I love the taste and consistency of this natural yogurt, and it is definitely more economical to make your own.