It's a special type of coffee press that uses pressure to brew the coffee. The brewing method extracts the coffee faster and more precisely than a drip machine, so it tastes smoother and fresher.
Moreover, those dark blends that you said you like? Trash. Those beans are dark and bitter because they got roasted until they burnt, and then they got torched again just to make sure they were completely ruined. Get yourself a locally sourced light or blonde roast, and you'll actually taste the bean. You'll thank me later.