I just found a chest freezer for a good price that I plan on using for fermentation. I already have a converted chest freezer for serving on which I use the digital Johnson Controls controller. I was wondering if anyone could recommend a slightly less pricey controller that will still perform well. I would prefer to stay digital, as I understand they are easier on the compressor. I don't know much about PID controllers, except that they are generally less expensive than the Johnson or Ranco types. Are PIDs used for a different application? Any thoughts would be appreciated. Happy Brewing!