Folding Proofer 5 "Can't imagine sourdough baking without it" Nick Fitch 13 May 2013 This proofer is not cheap, but it's an absolute godsend for someone like me with a cold house. Rising times are now much shorter and more consistent, and I'm now getting reliable results with breads made from sourdough cultures that need a lot of warmth to push up the acidity. I find the temperature is accurate to about 1 degree C -- which isn't bad at all considering the box isn't airtight -- and that's more than accurate enough for any leavening job. Haven't tried making yoghurt yet but that's next on the list. Expensive or not I'm well pleased with this.