One thing I have always hater about air fryers is that you kind of have to have faith in your timing and temps. Not anymore. Now you can see exactly what is going on inside your fryer!As many have said, you are supposed to leave the silicone stoppers on the tray. They will not burn. They are made out of the same material as silicone cupcake trays. This unit gets up to 400 degrees and the melt point for them is above that.I ran mine outside for about 20 minutes for 3 repetitions. This burnt off the factory smell. Which smells like various chemicals like plastic and electronics. After this I reheated some French fries and after that it smelled like whatever I put into it.The nice thing about the rubber stoppers is that they hold the tray in place when you pull the basket out to shake and/or flip your food. So, I've put burgers into it and then flipped them like a chef would in the pan. The same with French fries. Their smaller unit doesn't have these stoppers so if you do that it would also flip the tray around.When it is time to flip you don't cancel/stop the machine. You just pull the basket out and flip the food and then return it into the machine. It will then begin where it left off. One caveat is that if you kept pulling it out to flip at minute 3, before the entire minute is over, it will perpetually stay on minute 3. So it isn't keeping track of minutes + seconds when you flip the food, it just begins again at zero seconds for the minute you were on.The basket is huge. You can easily cook two big steaks in there. The 3.x quart unit used to do 3 breaded pork chops for me. This one does 7. And does them much quicker too.I cannot say enough how great it is to have the window to see the food. With this information and a couple of quick glances every few minutes you can gain information for future uses on how much time or temp is needed for different foods.Cleaning on all of their units is super easy. I use hot soapy water and a no scratch dish scrubber with a Teflon pad. Everything comes right off easy and no scratches.