So it's definately different than the regular Audio CD version of GTD. I have both the book and CD version?
The GTD Fast audio program is recorded from David Allen's GTD seminars, not from the book. There is less of an emphasis on the nuts-and-bolts implementation stuff... more on why the system works and what benefits you can get from it.
And, as spectecGTD says, it's entertaining.
If you can find it, buy... if not, DavidCo is supposed to be working on some new product to help fill that niche.
I had to hunt around to get the GTD Fast CD's but they were well worth it.
All the reasons people have given in this thread all apply here and I'd only add that it's the little comments that David makes in between the bigger points that sets these CD's appart from the structured and rehearsed "normal" version and which makes them worth having.
Several "ah-ha" moments and things that will stay with you for a long time. Do whatever you can to get them, if you still can that is!!
There were several copies of GTD... Fast on sale on UK eBay last week - I bought one, and it's great! - there's a link to the page on a thread I started here - I think the title was 'Audio in the UK...'