I absolutely love how quickly this oven heats up, it's a dream compared to my old one. I love that I can preheat the oven from my phone on the way home from the grocery store so I can pop a meal right into the oven without waiting. I also love that the app notifies me when the oven is preheated, and when the timer is done, as I am hard of hearing and don't always hear when it goes off. It has very pleasant, musical sounds and was very simple to set up!