Ok, the 500 cc bike they use is a Blast. It's a little bike with low power that's perfect for beginners. Doesn't damage when it falls over. The color is embedded into the plastic and buffs out scratches.
That was my wife's first bike and she loved learning on it, before moving on to bigger bikes. She took the msf course,
Any blog or whatever that things the Blast is a full size bike and that it doesn't compare with a 250 from other brands is fact challenged. It's a great bike for a learner course.
From what I understand the Harley course is like the msf course.
Everybody is ignorant, only on different subjects - Will Rogers
Do not do to others what you would not have them do to you - Hillel
If you can't be knowledgeable, be certain