I have taken many of their classes - quilting, garment sewing & fitting, knitting and crochet. I even took one of the jewelry classes! I give Craftsy high praise.
There was one class that I signed up for and then discovered it wasn't for me. It was a loom weaving class, and required you to purchase a very expensive (in my opinion) loom to use. I didn't realize that until after I had signed up. Craftsy refunded my purchase with no problem, and they actually left the loom class in my "Homeroom" so I could still watch it if I ever changed my mind. How can you beat that?!