Can’t say I have, but it strikes me as a cool utility line for fishing above weed beds. Kind of like the SA Booby line, which floats the tip only higher than the rest.
If you were looking at something like 10 ft water with vegetation on the bottom, the parabolic might be the ticket. Just not sure how much higher from the low part of the line the tip would swim. You’d also not want to use a sinking leader to get the right effect. A short, standard leader would fit the bill.