We just got it so haven’t cooked much yet but timed 12 minutes to heat from 0 to 350, and 6 minutes to go to 400. Way faster than my old older oven. And no heat escapes when the oven door is shut. My old one leaked so much from underneath that it burned my feet! It looks nice, very easy to use directions on the digital pad, and easy installation. So far, I LOVE it!