reject tray is the same as old maids drawer.
THe comment about the cart & storage is not completely true on the great northern machine. I find that it can hold the bars, salt, measuring cups, paper towels and the pouches. The side ledge holds the buckets.
Parts can be bought and I believe the kettle is $58.
Again, if you have money and want to spend it then the paragons/gold medals etc are highly regarded.
For me and some others, I don't make popcorn more than once a week and once a month a back to back batch. The price is right for it all.
And to clean it, I use baby wipes and then a quick soapy sponge and towel dry