I've ridden one. It was a fun and interesting experience. The belt, with handles and step platforms, came up at a constant speed from a hole in the floor of the factory.
Grab the handle, step on the platform, and up you go! When you get to the appropriate floor, step off.
Hint: Don't try for the round trip. On the way down, you're supposed to stand on the other side of the platform.
Well, that was confusing.
I think I’ll go take a large pile of vitamins and see if the brain-fog clears, since going back to bed isn’t a choice.
Darn these nargles ...