I've bought a lot of them too and I've like them all. I always wait until they're on sale for around 50 percent off. Like many others have said, take the classes that teach what you are interested in. When you click on the class you like, you can view a short video so that you can hear the instructor's voice and a little about her/his style. You can also click on each lesson within the class to see what it covers. So always research the class as much as you can to insure it will address what you think it will.