I'm not sure if you were replying to one or both of us. I've been implementing GTD in some form for about 4 years now. I've tried a variety of implementations and feel like I'm close to finding something that works while still fitting into the flow of my natural thought processes, work patterns and creative energy.
What I struggle with sometimes is maintaining my implementation when things get hectic. I suppose that could be a sign that I need to completely reevaluate and look for a system the works in both hectic and normal situations.
I'll take a listen to "Making It All Work" and see if I can glean some new insight.
Thanks for the input. It's always helpful to have this kind of discussion/reflection with people who "get it".