Guess it depends on the device, for me it is good if there are enough space on the edges so that the air can flow easily below. So the slices have to be small. Then the end result is more even, cheese remolten and the bottom does not get too soft or soggy.
I tried the AF a few months ago and found it just kind of made the top layer crunchy, so I usually microwave it.
Probably doesn’t help the flavour, but it keeps the texture just how I like it.
Guess it depends on the device, for me it is good if there are enough space on the edges so that the air can flow easily below. So the slices have to be small. Then the end result is more even, cheese remolten and the bottom does not get too soft or soggy.