I tried them out in my workout today. I didn't add any weight to the EZ-Curl bar, and damn they were burning my shoulders. I did 3 sets of just the bar at 10 reps.
Let's see if I did it correctly. I kept my elbows out to my sides, 10 degrees lower than my shoulders. Arms were wide grip on the curl bar, and started downward with the bar resting against my abs. Within one motion, I then rotated my arms about 180 degrees, pressed, and then reset to the start position.