I've taken two, "Bargello Seasons" (beginning Bargello) and "Bargello Blues". Both taught by Ruth Blanchett.
Highly recommended for those that want to work at their own pace from the comfort of their own home. You don't have to tote your machine anywhere. When the class opens they give you a password for the class where the patterns/tutorial are posted and there is a chat room where you can chat with teacher and all other students. Our teacher was very quick to respond. You can send WIP pictures in if you have questions and of course finished product pic's are posted as well.
I loved it, learned a lot, and will more than likely take more classes there at some future date.