GPEL 2nd-gen TGSP is good. Compatible, of course, with thin-fit type phone cases.
The GPEL may be OK with very thin cases, but not if you want anything more than scratch protection in your pocket or bag. I bought and returned the GPEL glass screen protector just a few days ago. It had a 1 mm overhang on the edges that was a magnet for dust and lint. I couldn't have used it even if I had wanted to go without a case. I also had difficulty in finding a relatively rigid case to go with it. It didn't even fit with my Spigen Neo-Hybrid Crystal case, which is TPU with a thin rigid support ring.
This is part of my email string with GPEL customer service:
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At .33 mm the glass protector is relatively thin but can make the difference in fitting with less flexible cases, which unfortunately probably means the heavier duty cases. However here's a list of cases reported to work/not work by our customers, but it's not guaranteed due to Samsung's 5% margin of error in the manufacturing of each Edge device which unfortunately results in enough variation on some devices to cause problems with our screen protector since it's produced from a single mold; as such users have reported the same case to fit and not fit (e.g. Otterbox).
WORKS:
VRS Design Layered Dandy
VRS Design Single Fit Smokey Grey
Caseology Wavelength Series
Ringke Fusion
Spigen Thin fit
AceTeah
Tauri clear case
OEM Samsung Leather Cover
OEM Samsung Clear Cover
calicase
DOES NOT WORK:
Obliq Naked Shield
Otterbox Commuter
Supcase Unicorn Beetle
UAG Composite Case
Otterbox Symmetry
Luvvit Sleek Armor
Spigen Neo-Hybrid Crystal (I added this one)
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