Recently got interested in roasting my own coffee at home. I tried the popcorn maker approach and it sucked. I bought one of these on Amazon for about $35. It takes about 6 to 7 min. so not to long. I usually do this while waiting for the water to boil. The beans come out really evenly roasted. I was very impressed. Though I would share a video on the process. I also wanted to play with DaVinci Resolve and Sony Slog footage from the a7ii.