The cheapest reflow oven you could buy 2 years ago was around $1000 so I made my own from a cheap toaster oven. Now this one is under $300 and its a steal! My concern was that it would be very difficult setting custom cycles. In fact its not that hard to do at all. However two of the pre-programmed cycles work for my different solder pastes. The progress of the reflow cycle is plotted on a graph as the cycle progresses. Checking the temperatures witha thermocouple, you must keep the PCBs away from the front 1" of the tray. (where its close to the glass) Anywhere else, the temperature is consistent.