I hadn't heard of that brand, but this one has been around for a few years.
I'd have to vote for "Snake Oil"...considering the vast majority of self-contained reach-ins use a constant cut-in, coil sensing temperature control, it goes without saying that these little gems wouldn't work very well.
Interesting idea,reminds me of a wine cooler control which was a probe in a bottle of fluid which sensed fluid temp. and cycled unit through a logic board which also inputted room temp. and humidity.Very limited/specific application but quite effective.