So first things first, you must know what this glass is intended for. This glass isn't for drinking whiskey. It's for tasting and sipping whiskey slowly. If you want to throw back a few drinks with big slurps of deliciousness, just use a rocks glass. This glass is not conducive to drinking quickly. It's meant for you to take slow sips while taking in the full aroma of the single malt scotch or bourbon or japanese whisky or whatever your brown drink of choice is. A few other reviewers have complained about its size and that you can't just throw drinks back with this. That entirely misses the point of this glass.
Now, what this glas is intended for, it does it very well. This glass helps you truly taste your whiskey. This is for people who like and truly appreciate the way whiskey tastes. If you view bourbon as just a vehicle for getting a buzz, look elsewhere. If you view the buzz as a nice side effect of a truly magical tasting spirit, this is your glass. Until this glass, I always thought those professional whiskey tasters were making half the stuff they said up. But when I started drinking from this glass, I truly started to experience the complex flavors of truly top shelf bourbon and scotch and even the occasional japanese whiskey. I could taste the difference between the different scotch regions. It allowed me to become a connoisseur of whiskey as opposed to just a drinker of whiskey.
Basically, the biggest secret is that it channels the aromas into your nose as you are drinking. Our sense of taste is just as much from our sense of smell as it is our tastebuds. With alcohol this is even more so, because alcohol dulls your taste buds pretty quickly. Meaning most of the flavor comes from smell. The second secret is that the design essentially controls the size of your sips to optimal level. for each sip, you basically want just enough to be able to lightly move it around in your mouth. Also, it tends to put the sip right on your tongue directly, which is preferred by whiskey tasters.
It's also a really gorgeous glass that really displays the color of the drink well. It's very easy to hold in your hand as well, due to the way the bowl hits the base.
If you've dropped a lot of money into a great scotch, bourbon or some other whiskey, this really is a great glass to help you truly appreciate it. If you want to drink beam and coke or even just swill your whiskey down at record pace, look elsewhere.