Product review (5 stars): Great device!
I bought this temp controller to turn a mini-fridge into a cheese cave to age hard cheeses for months at a time. The temp needs to be between 50-54 degrees for this and the Johnson Control works perfectly. It was holding a steady temp after less than 24 hrs. I put the probe in a jar of water in the fridge to insure a stable temp and it works like a charm. Easy to set up - just plug the controller into an electric socket, plug the fridge plug into the controller socket, put the probe in the fridge, set the fridge temp to its coldest setting, set the temp on the controller to what you want and voila! Great device at a reasonable price.