So I got my sheets of invisiglass today. I now have 20 pins all covered with either PDI or Invisiglass. I consider this type of product a *must own* for your pins. Now, I'm going to give my comparison of the two products. I will not be including pictures. You cannot capture the quality of these products with pictures. Pictures of this product will not give you any idea how they compare or how they perform.
Cosmetically, the two sheets of glass perform the same. There is a huge difference between having a regular sheet of glass on the machine vs having invisiglass or PDI glass on the machine. The colors pop. If you want to know how it looks, remove the glass on your pinball and look. That's how they both look. I cannot tell the difference between the two. One is not better looking than the other. They are basically the same.
As far as glare, neither of these prevent glare. Do not think of them as glare proof glass. You still need glare guards. I've said this before in other threads. It does not change with invisiglass. You will still see DMD glare on your backboard. If your translight is too bright, you will still see the glare from that in the upper playfield area (although slightly less than without this product).
The JJP logo is way smaller and not noticeable. I am glad they are removing it for future runs of the product. However, if I had received this before that, I wouldn't have been upset over the logo. When my non-logo sheets arrive, I won't even be taking extra effort to swap them out with logo based sheets. I'll consider the logo issue gone also since JJP will not have it in future runs.
Price: both glasses seemed to be about the same price.
Shipping: both shipped UPS and took about a week to arrive. Both cost a fortune to ship.
Packaging: Huge benefit to JJP on this. The PDI glasses arrived in the most annoying packaging possible. First, they are boxed in a single box wrapped with bubble wrap. That's fine. But then that box is put into another box. However that other box isn't big enough so instead Joey takes the box, cuts it in half, sticks the first box into it. Then the most annoying part. He fills this with the most horrible styrofoam popcorn. Then he puts the other half of the box on this and manages to cram more popcorn in. When you try to open this, it is impossible to get it opened without that pop corn going everywhere. Not only that, but this is the sort of popcorn that literally sticks to you. You will be spending at least an hour trying to fetch each piece of pop corn all over your room. Trying to toss it in a garbage bag or such is hard since it will just come right out of the bag and stick to your arm, shirt, whatever. It was seriously so unpleasant I considered returning the rest of the packages without opening them. Not to mention, I was stuck with 6 huge bags of popcorn to try to dispose of. JJP has some styrofoam inserts he uses instead. You do not need to hassle with any popcorn.
So summary:
Quality - equal
Packaging - JJP
Price - equal
Shipping - equal time once shipped. + to JJP for not having to wait 4 months.
This is my take on the product.