My horse could use loping in circles :) For the first oh, I don't know, five months we had him, he would lunge, no problem, on a lunge line. But now, when I try to, he just looks at me with his ears back when I flick the whip at him. When I try to move to his other side, he just spins on his forehand, one foot pivoting, as I [attempt to] walk around him.
So, long story short, yes, it is useful if you give it a use. Jay could really use this ;)
"A Bad Day Riding With Dad beats a Good Day Shopping With Mom."