Selected the 7-in-1 mechanical model based on preferring a basic, non-digital control product with the expectation they'll last longer. Heated oven to condition heating elements as recommended (1hr @350F). Using calibrated temperature gauge, Bake mode does not go above 325F. Roast and Air Fry mode does track better but can still be off by 30-40F. Initial cook of leftovers and carrots in 5x7 pyrex at 350F/Bake mode left carrots (half moon, 3/8 thick slices) still hard after 1 full hour. This is not a 450F device. Recommend always using gauge when cooking and only use the fan based modes especially if using both the baking and wire racks at the same time. Also, basket received bent, had to bend back into shape. Baking rack wire gauge fairly thin. Overall, seems oven only hits approximate temperature using modes that engage the fan. Would not buy again. This purchase replaced a competitor's older countertop model which lasted over 15yr.