I don't have PDI, but have heard it to be very similar (even the same) as JJP's Invisiglass, I own a sheet of invisiglass and can honestly say that I would buy more if I could afford it right now! Though I won't truly get to use it for awhile, I just put it on my Fish Tales for a preview. I bought the glass for my MMRLE...whenever that comes....hopefully sooner then later!