This is my first  experience with a convection oven. I was skeptical  of a microwave  with a stainless steel interior  also. I have tried almost all the features.   I love the oven and roaster and how golden the top of the meat was. I am still  trying to  figure out the  air  fryer and  try to match the results with smaller  air frye only  quality.  The air fryer is the only feature  I am iffy  about.   I  was able to make  great  tasting    beef and pork  roasts in  half the time as in a conventional  oven.  The  defrost  feature works  great too and the reheat  feature is  near  perfect