While it is simple to do the first roast, there is a real learning curve to this unit. You can vary fan speed and temperature by time. The basic automatic program just slams on the heater and turns the fan on full as it enters first crack.
I found an excellent Australian website on the Hottop with a 23 minute tutorial on more advanced roasting profile techniques. http://www.thingscoffee.com.au/kb.php
I have made a few roasts using their technique and looking forward to tasting them this afternoon.
One challenge is smoke. While my smaller roaster was fine under the range hood, this unit just puts out too much smoke for that. I placed it beside an open window with a fan between the exhaust and the window. Perfect. I turn on the fan at the same time as the internal fan turns on. Even as the roasted coffee was ejected in this picture, all of the smoke was pushed out of the window. A cheap and simple solution. In the summer I can see just roasting outside but as we are coming up on winter, I needed a kitchen solution.
I modified my roasting log and am going to modify the plotting program to follow not only the temperature but the heater and fan settings on the same graph. This should be interesting.