I had the same email. The price is tempting. I, however, like Terragen 2's interface and flexibility. Vue does too much of the set up for you. If you get down into how the objects and terrain setup is done, that's when the program gets buggy. At least this is what I found in the Vue 7 free trail version.
I think the pioneer version might be ok, for this price. I am sticking with Terragen 2.