At most of the schools that I have visited, they keep copies of the outlines from some of the students who scored a "B" or better on previous exams - they allow you to copy and use.
I would be more inclined to use the outline from someone who had taken the class and done well than I would be to use a commercial outline. Professors have individual styles and approaches to instruction that is cannot be generalized in commercial outlines.
Thanks for the input ridenrj...are these student outlines in the library for the most part? Do you know if professors suggest sutdent or commercial outlines or do they not suggest this at all?