This unit is by no means a professional popper because it cannot produce enough popcorn fast enough to serve more then one person every 4-5 minutes.
The product info claims that about half a cup of unpopped kernels can produce up to 12 cups of popcorn from this unit. I tried numerous times, using different varieties and quantities of popcorn and oil. The fact is, even when this popper is working at its best, it will only produce a single small serving per batch, (about the size of a large cereal bowl) and it will always waste about 10% of the popcorn kernels you put into it.
The so-called "warming light" is just a standard 60 watt lightbulb. It's not going to warm anything.
Waring calls this a "professional" popper - that is just a brand name. This is a consumer unit made in China. If speed and efficiency is your priority, you can save yourself time, money, and popcorn if you stick with a $20 stovetop manual stirring kettle.
If you're determined to have that movie popper experience, and you have the patience to experiment with how much popcorn to use (as well as having to make multiple batches at a time), this model could function as a novelty toy...
If you take the time to pop up several batches, one right after another, you can fill the bottom/front of the unit like the theatres do, and then scoop it into containers like they do at the movies. If your guests don't mind small servings, they can theoretically get theirs "right out of the kettle" but it will take a few extra minutes to serve everyone.