I got one for Xmas, still getting used to it. (and the accompanying temporary coffee toy/greens budget timeout!) The batch size is pretty small, but it works perfectly for me; I prefer a bunch of little batches (5-10 at 200g) to a few big ones, and I needed a roaster that was housebroken. I hooked up a vent out a window pretty easily, about the same roast smell as a dryer ducted Gene.
For a while I wanted a small commercial roaster, but realized that there is a lot of extra issues with install, location, warm-up time, cleaning, smoke, safety, fuel, etc. that goes along with the bigger batches. What I really wanted was a super gene; high duty cycle back to back roasting ability, some airflow control for better body, smooth heater control, ability to stick a thermocouple in da beans, and some notion that the skills learned might transfer up to one of the bigger machines some day.
Pretty happy with it so far!