While I've heard of 49th Parallel in online forums, this was my first opportunity to sample their coffee. We tried two different versions of Epic Espresso since they're in the process of reworking the blend; both versions were ultra clean, delicate espressos with a goodly amount of acidity. I thought the second revision was a step in the right direction, especially for those seeking added complexity.
A lot of taste descriptors get tossed about: Among the most heavily (ab)used are "smooth" and "clean." Epic Espresso epitomizes these characteristics, but given the general nature of the terms, I'll elaborate on my meaning:
Clean - Free of taste defect, e.g., no ash overtones or medicinal flavors. Mild aftertaste.
Smooth - Pleasantly balanced taste of bitterness/sweetness.
In the latest rendition, those favoring espresso blends featuring chocolate/roast notes should steer clear of Epic. It is dominated by citrus flavors: The first sips begin with grapefruit start (not lemon), then transition to a red grapefruit and dark cherry finish. The aftertaste is decidedly clean and delicate, though occasionally mild roast notes would linger among the lemon drop finish.
I would like to note a discrepancy between my experience and 49th's description that Epic is a sweet, complex espresso. While sweetness is noteworthy in the finish, it's not in the sense commonly discussed among espresso drinkers seeking blends dominated by almond/chocolate notes; rather it's begins as an attenuation of acidity and transitions to greater sweetness as the effects of the brightness fade.
Others have provided specific shot preparation values, to which I'll offer a simple hint: If the espressos are one-dimensional, lacking brightness, and dusty on the palate, try decreasing the dose while keeping the same flow rate (brew ratio of approximately 70% to 80%; I found dullness below this ratio and acridity above). It this change improves the taste, try dropping the temperature a degree or two, depending on the tradeoff you're willing to make between added interest/complexity and fleeting sourness.