If I may, I grew out some Chocolate Chunk a coupla grows back...sorry to say I don't have any decent pics, though...
In my own experience, I'd agree with almost all o' what KG said. My own girls had pretty typical, broad Indie leaves instead. Rich, dark green, but the apical tips where growth started was a bright, electric hue. Very pretty plant. Branches very well, holds water and doesn't need a lotta feeding, and roots/clones slowly. This strain was the earliest of any I've tried so far to show signs of resin production at flower. The buds didn't really beef up until the last 2 weeks, but were dense when done.
I found the taste to be the biggest disappointment, although this was probably the smoooooothest and least expansive toke I've ever had. The flavor I found to be more earthy/hashy than anything else, but maybe a longer cure mighta helped that. The high was a hard hitting body blow. Ya won't be going anywhere for a while, except bed if you over indulge...
As for smell...the burn I found typical, and the buds...nothing impressive. But if you're a security minded grower, this is the plant for you. At the peak of flowering, I had to give 'em a hard shake before gettin' anything at all. Very, very low aroma plant.