I bought this oven to replace and old toaster oven and an air fryer.  The temperature display is WAY OFF!  I had to buy a separate oven thermometer to gauge the true temperature of the oven.  If I set it for 375 degrees, preheat turns off at about 275 degrees and it takes about 10-15 minutes for it to reach the final accurate set temperature.   I ended up buying another separate air fryer because the air fryer option on this oven is more like the convection setting. Again, it takes way too long to reach an accurate temperature.