If it is a class I think I would like but want to wait til it comes on sale, I add it to my "wish list" on the site. I also experienced some problems with the classes playing correctly and the HD button does make a difference. Also, I recently downloaded a Video Download Converter (free app in Google store) and it greatly improved performance. Lastly, I will sometimes let it start to play - then put on hold and walk away for a couple minutes and come back and by that time a good part of the class has downloaded and I can watch trouble-free. I really like their classes including embroidery stuff - and sometimes I will research the info in YouTube and find some of the stuff there for free. I like Craftsy and they are branching out into new stuff all the time. My other favorite, as has been mentioned, is MSQ. I like that I can have the lap top next to me and work along, too. :-)
Marysewfun