Guy Kawasaki says a great product is "DICEE" which stands for: 

Deep. A great product is deep.
Indulgent. A great product is a luxury.
Complete. A great product is more than a physical thing.
Elegant. A great product has an elegant user interface.
Emotive. A great product incites you to action.

Is it possible to apply this model to your next training event?  Are the workshops you design "DICEE"?