I work on a fair amount of older code, both open-source and proprietary. I have found Understand to be an indispensable tool for learning new (to me) code. What I find most useful are the graphs that help me understand the relationships between different components/objects of a given set of source files.
I would not be able to learn code as quickly as I can without the assistance of UNDERSTAND!
ConsultantMartin D Turner ConsultingSydney, Australia