i have both and great thing is i never paid more than $200 a sheet for either. i bought the invisiglass from jen at jjp when they had a great sale and picked it up myself and i bought pdi from a local guy that was narrowing down his collection. because of the number of games i have, paying retail and adding the shipping would have killed the idea of getting any non glare type glass altogether. so whichever way you go, look for deals. they are out there. as far as which is better, to be honest, i could care less. with my glare guards, i can't see any reflection and to be honest, i don't even remember which game has what glass. now go ahead boob - start ripping me

In order to see the difference, though, you have to take the covers off your machines and play them once in a while.

lol. you are correct. perhaps that is the problem