I converted a chest freezer to a 5 tap "keezer," started with the STC-1000, but it only shows °C, found the same thing (Inkbird ITC-1000) on Amazon that would do °F, was around $15. I already had the other stuff for it (enclosure, etc), but you could pick up the rest of what you need pretty cheap and have a controller that will do both heat and cold for hardly more than $30 if that. So far I've not had any problems, and like the unit. Heck, at $15 even if I burn it up, cheap enough to replace.
I've got mine set to 37°F (3°C) with a 3 minute cycle and a 1 °F variation. I put the sensor in a small glass of water to stabilize temp fluctuations, and so far it's been right on the money. It's pretty easy to set up, the schematics on on the top of the unit, and there's a number of videos and how-tos on the web for putting one together, but if you have any electrical skill it's intuitive to say the least.
Amazon also sells a number of ready-to-go controllers around the $50 range, but they're pretty basic, just didn't seem worth the money when I could make something better and for less.