It's nice to "discover" a feature that you knew was already there but had forgotten. Reflector's "Analyzer" feature is a way to walk a Depends On/Used By tree.
I can fairly say that I never use the Visual Studio Object Browser but I live in Reflector. I've tried integrating it with Visual Studio, but this is one application that I like using Full Screen. I don't want it buried in a "toolbox window".
One of the things I love the most about reflector is that it is completely (and intuitively) usable via the keyboard. You just need to know:
Scott Hanselman is a former professor, former Chief Architect in finance, now speaker, consultant, father, diabetic, and Microsoft employee. I am a failed stand-up comic, a cornrower, and a book author.
Disclaimer: The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.