My Voxelab Aquila came with a standard glass printbed. So far I thought I had no issues. Recently I thought I will printing PETG a try. Result -> no chance to get that print from the bed without damaging one of both (of course I let I cool down first). But even before I had more and more adhesion problems. So after a few friends suggested I gave the magnetic PEI printbed a try and so far I have to say I am pretty happy with it. Prints stick good and come out great. Should have done that already a while ago. Oh and because I was already working on it I changed the bed leveling springs to rubber buffers. Seems a lot more sturdy now.
My experience is nearly the same. It’s sticks perfectly during the print (no matter if PLA or PETG) and as soon as it’s ready I can simply take of the print without it leaving any residues. After every print I wipe it with a wet cloth and I am good to go. Should have done that already a year ago! But I have to say I think you can easily f*ck up your print bed if you’re not careful while applying the magnetic sticker to the metal bed. If there is something in between or you get a little kink in the sticker I could imagine you will go through bed leveling hell.