That pretty much matches my impressions. * The DB class is a solid introduction to the field. * The ML class is good as far as it goes, but it lacks the depth

That pretty much matches my impressions. * The DB class is a solid introduction to the field. * The ML class is good as far as it goes, but it lacks the depth to be more than an overview. * The AI class has good content, but the attempts at gamification get in the way.