This is my first air fryer and we purchased it for less oil frying. We used it for first time with frozen fries. We had to use it on the bar because it vents hot air from the back and we read not to put on heat sensitive countertops   We placed a large piece of granite under it.  The fries were cooked perfectly but the most awkward and big negative about this unit was getting the tray out of the unit.  Very difficult reaching in unit and getting tray out without burning yourself.  Put unit in pantry and not sure if will use again.