If you ever get a chance to attend a workshop by a good trainer, with known/proven results and dogs whose style and performance impress you, do it!
I just got done spending three and a half of the fastest-passing, most retriever training information-filled days of my training career.
If you think the Total Retriever Videos are good, you should see it live and in practice. Mike Lardy is amazingly skilled at articulating in words to people, so many of the nuances that go into effective advanced retriever training.
I've made some great new friends. I've taken lots and lots of notes (a fraction of which, if I retain, will help me and future retrievers I train).
My expectations were greatly exceeded at the workshop I just attended. I believe that long after Bus is gone, I'll benefit. Not only through the stuff I've learned, but through the new friendships made in Wisconsin.