I have been roasting my own coffee for well over 10 years now. My old standby, an I-Roast 2, just bit the dust after 3 years of loyal service. Unfortunately, they are now out of business so I had to come up with an alternative. I decided to replace it with a Behmor 1600, which is a bit more expensive. But it should last even longer. Here is an excellent video showing its operation: Link to video. This is one amazing machine. I have always roasted out on my patio in the past due to the smell and the smoke. But the Behmor really eliminates that almost entirely unless you go into the second crack as Josh did in the video. You can roast one pound at a time with this machine. But most of the experts tell you to only do a half-pound at a time, which is twice the capacity of the I-Roast 2. If you have any questions about coffee roasting or coffee in general, I'll be happy to answer them. I am far from being an expert on the subject, but I am familiar with the basics.