You can directly control the heat and speed of the drum, allowing for endless experimentation under precise conditions, letting you dial in every roast until you have something spectacular.
It’s an expensive bit of equipment, though, and has a safety feature that’s a real double-edged sword. Around three-quarters of the way through roasting, you have to manually confirm that you’re still there or it will stop the roast. Some love the safety, others hate not being able to leave the machine to complete the cycle on its own.
