Product review (4 stars): Great functionality for the price
I was able to wire up and try out this controller recently to use with a stand-up freezer for homebrewing.  It allows great temperature control with the dual-stage output (which can be set for any combination of heating and cooling) and ability to set down to 1 degree of differential, a short cycle delay (great for devices with compressors), and more.  The programming of the device is very straight forward and the instruction manual explains the various options well.  However, one area that wasn't clear from the instructions was how the unit was intended to be wired.

The company web site provides a much better diagram.  The key things to note are:

- You are expected to bridge the hot wire to each relay terminal.  I am not an electrical engineer and perhaps this is standard practice, but I had assumed originally that the hot side would have been connected to the relays as part of the PCB design and that all I had to do was connect the hot and common wires from my output plugs to the two terminals for each stage and be done with it.  However, this is not the case.  See the diagram on their site, and also consider the change noted below:

- The diagram on the company's site shows the COMMON (white) wire being bridged to the relays, not the hot wire.  I believe this is less safe and probably not proper and things should be reversed.  The hot (black) wire should be the one going to each relay so that the outputs don't always have a hot wire even when they're turned off, increasing the possibility of an accidental short to ground.

Finally, one other thing I should note is that the lead for the temperature probe is relatively short, only about 2 feet or so.  However, I was told by the company that it can be extended with 18-26AWG wire up to 100 feet without any impact on the calibration of the probe.

Once properly wired and running, the device worked great for me.  It has been holding my set temperature to within a degree and I have not had any problems .  Overall I am very happy with the purchase.