This unit replaces a 6 month old LG OTR microwave which was terrible.  This machine is 2X quieter, more intuitive, better built, has better options, better smart button features and the functionality of both the convection and air fryer features are just flawless.  They both work very well, no complaints.  This is the only air fry OTR oven we found that has convection heating elements in it and i believe those are what makes the air fry function work so well on this machine as many of the other brands without it get very low scores on air fry and convection. The circulation air on its own just isnt hot enough, whereas this oven gets crazy hot literally right away durning the pre heat stage.  Very happy as its great to eject the fish and veggie air fry smells directly outside!  Also the included air fry pan with collapsable legs and the rack work very well.  Wonderful....Buy This Oven! You won't regret it....