I bought this because the SCD Diet recommended this brand. However, it gets too hot when you ferment the yogurt for 24 hours. My yogurt was 120 degrees and that's killing beneficial bacteria. The yogurt should be between 100 - 110 degrees at the most. Had I known this ahead of time I would have never bought it.It might be okay for 4 hr fermented yogurt but save your money if you are looking at this based on a SCD diet recommendation.