If you are sure you're going to get the game, I'd recommend skipping this as it covers an early tutorial section you won't want to go through again. Otherwise, do check it out. Punching people into bloody explosions while riding on top of a towering automaton that's wrecking your castle serves as a cool introductory sequence. It may just be enough to push you over the edge.
Gabriel also says the infamous line from the opening of Castlevania: Symphony of the Night. It's silly, but much of this game is as far as the 20-minute demo is concerned and there's nothing wrong with that. I do want to fight Satan and his minions as Dracula, thanks.