Doesn't sound like training I'd be wasting any money on. The "coupon" scares me (from the standpoint of QUALITY vs. quantity...this sounds like some chain sort of thing), and you want a CLASS not in home lessons. The best bet is to find an obedience training club somewhere nearby, or an instructor that teaches competitive obedience not just "pet" classes.
Here's an AKC obedience club in Michigan...don't know how close to you they'd be, but at least they might be able to point you in the right direction!
http://www.smotc.org/
Edited to add...just found this link for obedience trainers in Michigan. What a cool resource!
http://www.grrom.com/obedience_classes_in_michigan.htm