DHE audio reviews
I found all equally valuable although quite different.The 98 set is my favourite (funniest and most similar to the DHE training I took in Sept 97) although there is almost zero explicit instruction. The 2000 set has the most explicit instruction, generally provided by the excellent John LaValle.
One of the things John and Richard have done is to simplify NLP, make it easier to utilise. DHE was a major step in that direction, but also these two sets are a lot easier conceptually than the 92 set (which is 16 hours long).
So it depends on where you're at and your preferred learning strategy. If you don't like unconscious installation, forget DHE, you'll miss most of it.