I just whipped my Cafe Mocha out, forgot I even had it. Little less than 5 weeks old. Loaded in my 306 after some of Don's Cola, and WOW. The Cola really complements it, as gross as that may sound. Just throwing that out there. Though the Cola probably makes just about anything taste so much better, kind of like the Malty, only stronger and sweeter?
Fast forwarding a few re-drips.. as others have said, its dark but not too thick. It smells absolutely fantastic. Like mocha coffee, whoda thought. Where the Espresso tastes like an awesome cup of coffee, this, to me, tastes more like a strong blend of iced mocha coffee (without the ice?). Like a dessert, or 'treat yourself' cup of coffee. Not too sweet, just enough sweetness to give it a rich taste. Out of all the coffee flavors its hard to say which is the best, I think its more what you are in the mood for. However if you love coffee, its definitely a change of pace to the Espresso. Not sure if I prefer it to the Caramel, but definitely worth picking up. It generally does sell out quick, because everyone who likes it is waiting for it, and when I've seen it come up its only about 10 or so.
If you haven't tried the caramel cappuccino, I would highly recommend that while you wait for the Mocha.