Woah boy. We aren't screwing around anymore as we step up to one of the most highly rated beers every year. 

Reviewing this beer is way out of my skill set but I happened to stumble upon a bottle and couldn't resist giving it a try.
Look-Stone cold black with a deep rich brown head.
Smell-Man, everything is rich in aroma. Coffee for sure. Chocolate. More coffee. I can see just from the smell why it's called a "Breakfast Stout." It smells like Sunday morning.
Taste-The coffee is on the lips but you immediately taste the bourbon barrel aging soon after. Bitter chocolate undertones throughout. 
Mouth-Heavy, rich, and bitter. Heat in the aftertaste (slightly) mellowed out by the sweet chocolate taste. 
Overall-I can easily see what the hype is about. This is a complete drinking experience. A few caveats before you go out and pay a lot for this little gem (this 12oz bottle was $6.49). I'm not a huge stout fan (More now than I've ever been but still not one of my favorite styles) so this isn't really in my sweet spot. Can I appreciate it? Yes. But I'm not a coffee drinker and I never drink hard alcohol (which are the two major ingredients in this). Also, I can guarantee this this will get better as it warms. I let is warm for about 5 minutes before drinking but it was still pretty chilled. I imagine the chocolate will come out more and the heat will balance out at room temperature. But make no mistake, this is a fantastic beer that a craft beer lover will have to sample. 
About Founders KBS: 
What we’ve got here is an imperial stout brewed with a massive amount of coffee and chocolates, then cave-aged in oak bourbon barrels for an entire year to make sure wonderful bourbon undertones come through in the finish. Makes your taste buds squeal with delight.