You can smell the coffee while I'm roasting coffee, I was demonstrating roasting to a couple who visited yesterday that would like to purchase a coffee roaster like my own - they got me talking though and I took my eye off one of my roasts a little too long and it got darker then I like - coffee beans go from light brown to near black very quickly at the end of the roast - and the smoke is intense I nearly lost them in the smog filled roasting room!