Now my company is interested in upgrading to InstallShield Developer 8 in order to make use of the MSI integration. We have purchased the software, but I am currently finding the differences between the versions to be HUGE!!

Since we have over 20 separate installs for our product line, I would like to take some training so that I can have a good knowledge base for rewriting the new installs (and be able to do it right the first time). I have been looking at the IS training but have some questions on the courses offered.
Has anyone taken "Learning InstallShield Developer 8"? If so, was it worth it? I am familiar with InstallScript, but it's the MSI side that confuses me. We'll always be creating InstallScript MSI projects, so I figured that the "Learning Windows Installer (MSI) Technology" course wouldn't have too much to offer me. Am I right in this assumption?
If anybody has taken any IS training recently, I would appreciate their opinion on the training courses.
Thanks,
Jamie