Grip on a totally different level. I never use brims and in 9000 hours of printing on bambu never once had a failed first layer after switching to the polyura plates. They allow you to print things that would be impossible on the PEI, tiny contact patches. They prevent warping as the grips is so good. Also the adhesion does not deteriorate with time like PEI, no washing needed. Until you try a Frostbite/Kdavi polyura plate you wont understand if you dont now, night and day difference, even compared to the new improved textured PEI with the coating.