Let me start by saying I am fan of the Herradura family of tequilas. The crystal anejo is easily one of my favorites. This could stem from the fact that Herradura is one of the oldest producers of tequila as it was founded in 18700. The Double Barrel Reposado is aged for 11 months in oak barrels, then aged another month in a toasted oak barrel.
Herradura to me is not one of the sweeter tequilas. One thing that is always at the forefront is the spiciness. On the palette, you still get complex flavors from vanilla, allspice and agave. However, on the nose, you certainly get that impact of being aged in the toasted oak barrel.
I have always said that complex Anejo tequilas start to remind me of certain varieties of Whiskey. This is especially true with Barrel Select Reposado. So, if you are more of a purist with your tequila and not much of a fan of Whisky, this may not be the tequila for you.