For whatever it's worth, I found that a full silicone liner like the one shown here had a detrimental effect on the cooking ability of my air fryer. It doesn't really allow the air to fully circulate like the inserts that are perforated, so in some cases, my food seemed to take a bit longer to cook and was less crispy if I didn't increase the temperature or time. In addition, even though the silicone is supposed to be helping with cleanup, it often was a bit greasy even after really scrubbing it, and stronger smells lingered unless I used a special paste treatment or soaked it, defeating the purpose of easier cleaning.
When I cook a frozen burger in my air fryer (same basic barrel style shown in the original post), I put about two tablespoons of water in the bottom of the drawer—enough to not quite cover the surface—and place the patty on a little wire rack to keep it elevated. Halfway through the cooking time, I use tongs to flip it. The results are always perfect, and I absolutely love not having the smell of grease or smoke fill my kitchen like it would with a skillet or indoor grill. The air fryer is wonderful for burgers, steaks, chops, and chicken with much less hassle and much cleaner air. 