I personally enjoy this as a part of my DC routine.
I am able to do, say, 7/4/2. But after that, there is no way in hell I will be able to get another rep in during a short period of time with that weight set. So I usually cut the weight in half and go until failure (aiming for 14-20) and I REALLY feel my muscle working, it's just an excruciating pain / workout that I have really grown to believe heavily influence muscle growth.
Another good example of this is doing the widowmaker as a second set for squats when doing DC leg training. There is a lot of fiber activation and I have felt like it does give a lot of results. The days after, I feel like I can barely move my arms, whereas had I stopped at just the DC I wouldn't feel as sore the next day (a little exaggeration, but you get the point)