To be honest, I was extremely skeptical of the Oil Chef device, but the possibility of significant money savings was worth the risk. We had been changing our oil every 3 days to ensure best food quality and that was expensive. With the Oil Chef units in my fryers, we now cooking at a lower temperature & change our oil weekly with no filtering at all –this product does exactly as they said it would! Our food quality remains excellent and we are saving hundreds of dollars per month. From skeptic to believer within just 2 weeks!! I highly recommend Oil Chef!