Quoted from beelzeboob:Simple. I looked at the reflection of my face in the Invisiglass, regular glass, and PDI glass while the overhead lights were on. I could see my face in all but the PDI, and since it's painful to see my face, I switched over. Additionally, the reflection of the lights was drastically reduced in the PDI glass. If you ever get to A/B them side by side, you'll see that it's no contest.
I have both PDI and Invisiglass; I don't see a difference whatsover. Both are great.