I too have used Valterra. Works good. But I did not know that you can spray it in the fall. We sprayed after seeding. Fall Aplied would save us a lot of time in the spring.Used Valterra on some nasty kochia land we rented last year. Very impressed with it, sprayed in October and planted large greens in spring. Not a single kochia weed this year. Still had a mess of wild oats, and I think fierce is supposed to control them but I have no experience with it.
We are in a heavy gumbo area, I hear of guys using in on lighter sandy land not having as good of results.