Yes, I use Eclipse at work and the workflow is pretty amazing. Refactoring was key for trying out Eclipse with Gamestudio. For example if you rename a function, it will be renamed in all managed source code files! The same for local variables, macros, globals, struct names, etc. What I also really like is the context-aware code completion.

I don't like the Eclipse project management in general, but if you connect your projects as SVN projects, it is OK.

But the most important feature to me is the auto-formatter