My original Creality glass bed was absolutely perfect. I would test new filaments by printing a calicat at 50% (so the little fit that stick to the bed are only 4mm square) and I expected those tests to stick perfectly. Then after 3 years of use the coating wore out and I got a new one from Creality – it was horrible!!! Absolutely nothing sticks to it, even large prints were getting a lot of curl. I don’t know what they changed but it was really disappointing. That’s why I ended up playing with the G10 and PEI, and even my smooth PEI bed doesn’t have the adhesion my original glass had, so maybe I’ll have better luck with textured PEI.