Price: $75.00
Pros: Easy to set-up, controls the freezer very well
Cons: Using the temperature probe is a bit awkward, will need to modify the freezer lid to avoid having it run beneath the door seal
Recommended? Yes

Comments: Have recently purchased a Craigslist freezer and this device turned it into a fermentation chamber/kegerator. Quick shipping from Midwest Supplies, device came with technical drawings & instructions but learned more from reading posts on HBT on how to set it. Holds temperature well, stays within the margin I set for fluctuations. Very pleased with the device.

Price: $55.00
Pros: Easy to Use, Does the Job Effectively
Cons: Have to install wiring...not particularly difficult, though.
Recommended? Yes

Comments: I have this temperature controller installed on a beverage cooler fermentation chamber. Works great!

Price: $60.00
Recommended? Yes

Comments: i am a perfectionist...so a digital would've been preferred, but for the money this works great!! took a couple days to dial it in, but once i had it there i only check on the beer to make myself feel better. great product for the price!

Price: $50.00
Recommended? Yes

Comments: Cold Cycle Only! Works well enough. Temperature probe sits under/near active fermenting beer.

Price: $130.00
Recommended? Yes

Comments: Love this thing. It turned a chest freezer into a digitally controlled fermentation cabinet. Let the lagering begin!

Price: $40.00
Recommended? Yes

Comments: I would recommend these to anyone. I bought it at an HVAC supply warehouse and wired it my self. It cost be 40 bucks. It has two modes that can be set to either heating control or cooling control. Great for big temp swing regions like here (las Vegas).