Finished FINAL - only until too late did I realize much, much, much of it had already been spoiled for me (can't say right now) so I didn't enjoy it as much as the series. However, I have to disagree with the folks who say FINAL was a "betrayal" of the series' theme - the theme wasn't present nearly as strongly, and there were a lot of weird bits, but it didn't spit on the grave of GGG.
That said, FINAL impressed me for the first time with the introduction of Genseic GaoGaiGar. GGGG was FUDGING AMAZING, wow, what a pity that monster wasn't around to battle the Z-Master!