PETG is great stuff. It's clear, making it great for displays, enclosure windows, and artwork. It's far stronger and more flexible than acrylic, but can be cut and engraved on a laser cutter, unlike polycarbonate. If you've recently received a clear engraved business card from Big Blue Saw recently, it was made from 0.02 inch thick PETG.
We have added 0.25, 0.125, 0.09, and 0.02 inch thicknesses of PETG to our online quoting system to complement the 0.063 inch thickness we already offer. As always, if you don't see a material or thickness in the online quoting system, just contact us and we can probably get it for you.