Chuck Cowdery's blog if the history is interesting to you, he has a book as well). Just know that there were rumors that Bernheim stock made it's way into some Pappy Van Winkle bottles. In other words, some good stuff has come off of the still at Bernheim. This one is 90 proof, by the way.
Color: A bit lighter than your average bourbon, perhaps that is the effect of wheat? The rest of the mash is corn and a bit of barley.
Nose: Jason Pyle over at Sour Mash Manifesto gets graham cracker on the nose, and there is a bit of cracker, toast, or something of that nature. The nose is strong yet soft, if that makes sense. Pleasant.
Taste: It's very round in mouthfeel, as you might expect from a wheated bourbon or a wheat whiskey. Jason Pyle gets lemon candy up front. There is an acidity, with some sips it is more like candy in others a bit less pleasant. Once it moves to the back of the tongue there is a nice toastiness, like campfire marshmallows. It's very warming yet smooth all of the way. There are some typical bourbon type flavors from the new charred oak, vanilla, some spice and oak, etc. But it is a unique bird a bit harder to describe than its cousin, bourbon.
Finish: Again, soft and pleasant, but substantial.
Value: I think a fair comparison is Maker's Mark, the most famous wheated bourbon. Similar in price and both featuring wheat. Bernheim may have a bit more interest to it, a bit more range of flavors and a better finish. That's not to say it is better than Maker's. The folks at Maker's set out to make a reasonably priced, tasty sipping whiskey that has mass appeal, and they have achieved that. Bernheim and Maker's might both be good introductory type whiskies. Not too harsh but with nice flavors. I do think $28 more accurately reflects what this whiskey is than $40.
Intangible/Overall: It's kind of a novelty. If you like novelty, great. But in a way, novelty can never trump the association you make with your favorite spirit. You can say, "that's damn fine bourbon, " not so much "that's damn fine wheat whiskey." But it could have a place in your rotation, a good change up.