I have a pre wired Johnson Controls A419 Temperature Controller that I have used for a few months without ANY issue. It has sat in a corner running my keezer but I figured that now that have built a dual stage controller, I no longer need this. This is the easiest way to get up and running with temperature controlling as you simply plug in your freezer/refrigerator and tell it what temperature you want to keep it at.
This goes for $84 + $8 shipping new on Northern Brewer but I am selling for $65 shipped. Good opportunity to get one of these barely used for cheap.
Let me know if you are interested!