Product review (4 stars): Great product
I got mine for a great deal (was ~$40 cheaper than it is now). I use the controller for home brewing (dual stage temp regulation in a chest freezer with added heat source). Setup was easy, device has many configurable options, has been working for almost a year fine.

The one negative would be the wiring guide. I did some browsing online, and found multiple knowledgeable people recommending against the wiring scheme mentioned in the drawing. Unfortunately I don't have info on hand, but I found better instructions for wiring this device up.