I am signed up for five classes on Craftsy and have finished two of them. I do look quickly at each when purchased; I always wait for them to go on sale ($19.99 or $15 if lucky!). My mind has been opened up to new possibilities in my quilting and art quilts (who knew I would be considered an artist!). I am now making things that people actually want to buy and I'm having a ball.
In all Craftsy classes, you can print out the list of materials needed and you can interact with the teacher and other "students." You may take notes if you need to do so right in the middle of a class (only you can see your own notes). You get feedback from the teacher and students when you have a question or send in a picture of your work.
I really like the classes and have learned a lot from each one! Go for it.