Mine is in a Keezer, so that may be a bit different, but It has a standard deviation of 2F +/-
It kicks on at 36, and off at 32. The beer is stable at 34! (No comments about it being too cold please)
The only time mine really kicks on and off a lot is for the first 24 or so hours after I set a new keg or 2 in there. Once all of the liquid is the right temp...it holds it pretty well. And the thing runs a ton less than the freezers that we use for freezing stuff.
Seriously. I'm here for BEER
It's Not The Size Of Your Rig That Counts....It's How Often You Use It.