I am writing from the point of view of the production of moonshine, for other purposes I see no reason to use it. Perfect for devices with a cube of up to 30 liters, it heats up 20-25 liters 40 minutes before the start of the haul, which I consider a wonderful result. But it is quite suitable for larger containers. The extraction rate at 1 kW was about 1 l / h, so if the productivity of the device is lower, this plate will not work, and the selection of heads will not be of very high quality. My device is quite productive, so I didn’t use it below 1000 W, I select heads with a dephlegmator. The lack of momentum didn't affect me. The efficiency is about 75%. I calculated it like this - I took an insulated cube and heated water in it, made several measurements, calculated the heating rate and the real input power based on the heat capacity of the water. It turned out about 75-78%, i. e. at 2 kW, 1.5 kW is consumed for heating. The measurements were made at a liquid temperature close to the ambient temperature, so cooling losses can be neglected. As the temperature rises, the rate of heating naturally decreases. In general, I consider it an ideal stove for these purposes if you have a powerful enough apparatus, but not so much as to cook in industrial quantities.