I did a week long course held by Imaginit. They provided 2 books, classroom tutorials and hands on training. It was overall pretty good! I use the books a lot for reference as they provide pretty good step by step instructions and tutorials. All tutorials performed come with a CD and can be accessed at any time. I would say it has helped me with my advancement in Inventor. I took the Basic Introduction to Solid Modelling.
Hope this helps.
I'm a little biased on this (since I wrote a few of the exercises) so I'll just add to the ebook conversation...
Now I have done an iPad class with the books and it was awesome. The students can subscribe to my notes so when I make omissions or course corrections or make a point about concepts they can instantly see the notes in their iPad version (which also works on a desktop application or Android device). It went over very well.
No I haven't taken these courses in the classroom. I did do the advanced part modeling 2012 in the P-Now on-line course.
The courses I did take were the vault basic and admin. What I found lacking is the admin course never provided
a manual to reference for later times and to follow and markup during the course. Also, the course material didn't get real deep and left a lot of us asking more questions and feeling a complete understanding of the software. In my opinion the time was too short and needed to be longer in order to cover the contents in greater detail.