There are guys that swear by it and use it frequenty, on nearly everything, for
moisture, glisten look, and taste. I'm in the other camp. To me, Parkay has
a noticable taste, one that I dont personally care for. While it may help with
that shine/glisten, I've not had a need to add anything to make it moist. Giving
the high weighting on taste over appearance, I go without it.
All in all, it's whether you like the taste or not. 90% of the time, when deciding,
go with what you prefer on taste.
Best of luck.