"I love these!"
I hate hot food on a cold plate. Since I got my air fryer, I use the oven less, so I often don't have anywhere to warm the plates. These had mixed reviews, but I thought I'd try them. I love them so much I've bought a second pack! Now I have lovely hot plates again. I make sure each plate has a plate warmer top and bottom, so this means adding an extra plate to the pile for the bottom warmer. Then I give them 30sec each plus 30sec (a bit longer than suggested), ideally 10 mins before I need them so the warmth can dissipate to the whole plate. And don't use chipped or cracked plates!