I like the site, content, animations, etc., all very well done. The mandatory waiting times per screen were dreadful though. I understand it's to encourage people to actually learn the content, but it make the course painfully longer than it should. Perhaps it could be modified that mandatory timing is only when you choose to read versus watch the videos? Also, the inability to review the quiz (not final exam) material to know what you got wrong is completely counter productive. Without knowing where you got it wrong, you second guess items you knew where right. 100% absolutely you should be able to review wrong answers, how else will you learn? That is the object here, right?