I haven't taken any of the Craftsy classes, but I have taken classes at QuiltUniversity.com and I liked them a lot. Most of these classes are specific to a technique - not general quilting classes (so most assume that you know the basics). Not sure if this is what your looking for, but check the site out and the courses and see.
The classes were good, good clear instructions from the teacher, quick responses from the teacher on the online forum shared by all the class, ability to upload pictures to a forum area where you can ask specific questions about your work.