Product review (5 stars): Perfect for Homebrew
Before I get into the details of my setup, I want to say I am very happy I bought this controller.  It's not hard to install or use and it works really well - but more importantly, I had contacted tech support at Control Products and they quickly helped me.  It was clear that they genuinely cared about resolving my issue.  They were professional, knowledgeable, friendly - just awesome.  It's not often you get that kind of experience when you call customer support and I can't say enough good things about them.  As it turned out, there was nothing wrong with the controller.  I had it plugged into a switched outlet that turned off when the room lights were shut off. Ugh, I know.

I bought this to control the temperature of my fermenting mead and beer.  I placed a small ceramic heater inside an upright freezer and the controller keeps the temperature inside the freezer wherever you set it (within a set window.)  Here's my setup:

Model: TC-9102D-HV
SP1: Cool @ 71
SP2: Heat @ 67
Dif 1 & 2: 2
All other settings are default

This creates an effective range of 65 to 73.  This may seem like a large variance, but it works well for me for a few reasons.  The ceramic heater still radiates some heat after it shuts off.  That causes the temperature in the freezer to raise another degree or two which would cause the freezer to turn on if the cool setting was set at a lower temp.  The 2 minute differential setting prevents any short cycle issues.  Finally, the average temperature works out to be 69 (my target temperature) and since the air temp changes much more rapidly than the liquid in the fermenters, the yeast do not really "see" the change at all.

For installation I used a drill and bit
a #2 phillips screwdriver
4 small sheet metal screws (not sure of size)
some wire to make jumpers
<a data-hook="product-link-linked" class="a-link-normal" href="/a-3-8-cable-clamp-connector/dp/B000VYIXIQ/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">a 3/8" cable clamp connector</a>
<a data-hook="product-link-linked" class="a-link-normal" href="/and-some-yellow-and-orange-wire-nuts/dp/B000K7M35I/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">and some yellow and orange wire nuts</a>

I got my stuff at HD

I mounted the controller on the side of the freezer using some sheet metal screws.  In the back of the controller there is a hole for wires to pass through into the freezer.  I drilled a hole in that spot -into the freezer- large enough for the temperature sensor wire and heater power cable to fit through.

I cut the ends off the freezer and heater power cords and fed them into the controller.  I used an Ohmmeter to make note of where the hot and neutral wires were when I cut them.  Using the cable clamp, I passed the freezer cord through a hole in the bottom of the controller.  This is also where the power cord for the whole setup goes.  I used a spare computer power supply cord and cut the female end off that.  Then I just followed the wiring diagram found on Control Products website, using bits of solid copper wire for jumpers and wire nuts as needed.  Others on here have said to reverse the hot and neutral wires.

Whew!  That's it.  Not too hard or expensive and works great!  I've got 3 batches of mead fermenting in the freezer and I've ordered another controller to do a second set-up.  Home-brewing is fun!