You can use LeaderGuide Pro to make your documents look professional and consistent (even with multiple contributors) - an instant win with clients and management… But the real power of this product is in its content management features. See my response to "What business problems are you solving?" below.
LeaderGuide Pro is *very* customizable, and new releases introduce more and more customization features. You can use the software to create multiple "collections," or templates, per your or your clients' branding/preferences. You can touch just about everything - even the interface (the program's look and feel).
Great Circle Learning (the vendor) is extremely responsive and helpful.
The learning curve can be steep for novice Microsoft Word users without help, and the price could be high for a single self-employed user.
Go with the subscription license. You'll be able to upgrade as soon as new versions and any patches are released, and each version adds so much new functionality that you really don't want to miss a single one. Great Circle Learning listens to its users and updates always include features or improvements that every-day users of the product suggested.
Take advantage of GCL's outstanding customer service and their offers for one-on-one conversation. They're not just there to help you when you get stuck - they offer advice, suggest the best way to tackle a project, and often give tips and tricks that save tons of time. Of course they know their own product, but they also know Microsoft products and can recommend best practices that will inform your work outside of LeaderGuide Pro.
We have multiple audiences who take classes structured around the same content (we do application training). Examples, sequence, level of detail vary, but the core content is the same.
Before we had LeaderGuide Pro, we had created and were maintaining individual instructor and participant guides for each class; we had multiple people making the exact same change to multiple documents each time the content needed to be updated. We saw heavy cost in terms of time and quality, and a very obvious lack of consistency.
The biggest benefit we've seen has come from using LeaderGuide Pro's extraction functionality. We create a master document for major topics in our curriculum that contain all of the examples, details, notes, etc. for each audience in one place. We update this single source when the content requires changes. We archive these master documents and then build our classes from the parts, extracting only what's required for a single audience (and leaving the rest untouched in the master document). The instructor and participant guides are always up to date and in sync, and we've streamlined the materials maintenance to a bare minimum, which means our resources are freed up to do other work.