Product review (5 stars): Works as advertised if you have the wiring diagram
I needed a dual stage controller for a chest freezer to keep my home brew kegs.  I have only wired up a single (cooling) stage so far as this is my keg fridge.  I couldn't figure it out at first - there was no wiring diagram included in the box.  I went on the company website and got the wiring diagram and it took 10 minutes after that. I attached a conduit box for my wires with Velcro - I will try to upload some pictures.  But it works perfectly once I got it wired up.  I just ordered a second one for my fermentation fridge so I will need heating and cooling on that one.  Will post once I have that set up.