Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works well.. when mat works.

I got this to control to one mat, this works well when the mat works. had to get replacement mat(another story), instructions was not the best, but I figured out how to change the set point to what i wanted. Controls the temp very well cycles on and off.. with 1-2 degrees. Would get another if i needed it. Package was a little tough to open(thats what knifes are for).