There is an interesting post on a Firefox developers blog that describes how great the VC6 debugger still is, despite being almost six years old, chiding the open source folks for still not competing with it. We should be flattered I guess.
Although I haven't used VC6 myself for over six years (we had moved on to the 6.1 debugger quite a while before 6.0 shipped, and quite a while after 6.1 itself was cancelled), I know that it still does have its fans. I personally think you are all crazy for using it, dont you debug STL code, or want to use a modern optimizing compiler that knows about today's CPUs, or run on a multi-processor machine? Ah well, at least tech support is basically expired for VC6 and I don't have to deal with it any more. Right Tim?
I don't know much at all about the state of the open source debuggers or IDEs that Ben is talking about, but I assume he does.