We've had the oven for a couple of weeks.  I've used the bluetooth preheat feature.  It's so nice to have the oven ready before we get home.  I've also used the air fryer for some cheese curds.  My son said they were delicious.  So far, it seems to cook evenly.  We're still in construction so it's not used daily.  I look forward to seeing it's full potential soon.